This is a personal, observation‑based question — but here are two clear model examples you can use, or replace with your own:

Other examples you could use instead: collecting firewood from a forest (forestry), a goat/cattle herd grazing on grassland (raising livestock), or sand/stone being dug out at a mining or quarry site (mining).

The chapter already gives automobile manufacturing, textile manufacturing, pharmaceutical production and furniture‑making as examples. Two more secondary sector activities are:

1. Steel manufacturing — processing iron ore extracted from mines (a primary sector output) into finished steel used for construction and vehicles.
2. Food processing / bakery production — converting wheat flour into bread, biscuits and other packaged food items in a factory.

A few more you could use instead: cement production, sugar milling, shipbuilding, or electronics assembly (e.g. assembling mobile phones) — all of these take a raw or semi‑processed material and transform it into a new, sellable product, which is exactly what defines the secondary sector.

This is a personal, local‑knowledge question — but here are well‑known Indian cooperatives (beyond dairy) you can mention if you don’t know a local one, or use as inspiration to find one near you:

Following the chapter’s own definitions (extraction from nature = primary; processing/manufacturing = secondary; services such as transport, storage and sale = tertiary), here is how each stage of “tree to textbook” is labelled:

This is exactly the point the chapter makes right after Fig. 14.1: none of these steps — from extracting pulp from the trees to finally producing the book you are holding — would be possible without all three sectors working together.

• Print and write on both sides of the paper
• Reuse the blank side of used sheets as scrap paper for rough work
• Prefer digital notebooks or e‑submissions for homework where possible
• Avoid unnecessary printouts — proofread on screen before printing
• Use smaller fonts and margins when printing long documents, to fit more per page
• Donate old notebooks and textbooks to juniors instead of discarding them
• Keep a paper recycling bin in every classroom and office
• Use a common notice board instead of printing individual handouts for every student

Flow of dependency: Farm (primary) → Pickle unit (secondary) → Grocery store / vendor (tertiary) → Households (final consumers). An arrow can be drawn from each box to the next, showing goods moving forward at every stage.

• The pickle unit cannot function without fresh vegetables from the farm — it depends entirely on the primary sector for raw material.
• The grocery store depends on both the farm (for fresh vegetables) and the pickle unit (for packaged goods) to have anything to sell.
• The farm, in turn, benefits from the store and the transport service, because without a way to sell its produce, growing vegetables would not earn any income.

If the farm stopped growing vegetables, the pickle unit would run out of raw material and the store would have nothing fresh to sell — the whole chain would break down. Similarly, if the transport service disappeared, the vegetables might rot before reaching the shop, even though the farm and the store both still exist. This shows that all three sectors are interdependent — each one needs the others to function smoothly.

The primary sector consists of those economic activities in which people are directly dependent on nature to produce goods — it involves the extraction of raw materials straight from nature, such as farming, fishing, mining and forestry.

In short: the primary sector gets the raw material from nature, while the secondary sector transforms that raw material into a new, usable product.

The secondary sector (manufacturing, construction, processing) cannot function on its own — it relies on several tertiary sector (service) activities to actually get its goods made, moved and sold:

The chapter’s own AMUL example shows this clearly: milk is processed into butter, ghee and milk powder in AMUL’s factories (secondary sector), but those products only reach people because AMUL uses lorries, trucks, railway, air and shipping services to transport them, and sells them through retail stores (tertiary sector). Without transport and retail, the factory’s products would simply pile up with no way to reach customers.

Both examples show the same idea: the secondary sector cannot work without raw material from the primary sector, and neither the primary nor the secondary sector’s products would ever reach people without the services of the tertiary sector. The three sectors form one connected chain, each depending on the one before it.