Discussion

There are two columns, Column-A and Column-B :

Column-A	Column-B
(a) Canopy	(i) Dead plant and animal tissues
(b) Decomposers	(ii) A wild animal
(c) Humus	(iii) Microorganism
(d) Porcupine	(iv) Branches of tall tree

Which one of the following is the correct sequence of Column-B for the given sequence of Column-A?

Answer: D

The correct sequence is (iv), (iii), (i), (ii).

Canopy: the roof formed by the branches of tall trees in a forest.
Decomposers: microorganisms such as bacteria and fungi that break down dead matter.
Humus: the dark organic matter formed from dead plant and animal tissues.
Porcupine: a wild animal of the forest.

The other sequences give humus the microorganisms or the canopy dead tissues, so only D matches each term.

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