There are two columns, Column—A and Column—B: Column—A: (a) Canopy (b) Decomposers (c) Humus (d) Porcupine. Column—B: (i) Dead plant and animal tissues (ii) A wild animal (iii) Microorganism (iv) Branches of tall tree. Which one of the following is the correct sequence of Column—B for the given sequence of Column—A?

The correct matching is: (a) Canopy = (iv) Branches of tall tree — canopy refers to the upper layer of branches in a forest; (b) Decomposers = (iii) Microorganism — bacteria and fungi that decompose dead matter; (c) Humus = (i) Dead plant and animal tissues — the organic component of soil formed by decomposition; (d) Porcupine = (ii) A wild animal — a spiny rodent. Therefore, the correct sequence is (iv), (iii), (i), (ii).