Q.Which one is in descending order of a food chain

Step 1. The chapter's ascending food-chain order is Producers (T1) → Primary consumers (T2) → Secondary consumers (T3) → Tertiary consumers (T4); a descending order is simply this sequence read in reverse, from T4 down to T1.

Step 2. Reversed, the correct descending order is: Tertiary consumers → Secondary consumers → Primary consumers → Producers.

Step 3. Checking each option: (a) starts at Producers and ends at Tertiary consumers with the middle two also swapped — this is neither the ascending nor a consistent descending order. (b) starts at Tertiary consumers correctly but then jumps to Primary before Secondary — the middle two are swapped, breaking the descending sequence. (c) runs Tertiary → Secondary → Primary → Producers, exactly the reverse of the correct ascending order — this is the correct descending …

Reverse the chapter's stated ascending trophic-level order (Producers→Primary→Secondary→Ter …

• Picking an option that starts with 'Tertiary consumers' without checking that every subsequent step is also in strictly descending order — options ( …