A true example of an organism and its ecological niche is:

Correct option is D

Correct Answer: (d)
Explanation:
A true ecological niche example must represent both the organism and its specific habitat with adaptations. The desert locust is perfectly adapted to life in desert ecosystems, hence forming a true organism-niche relationship.
Information Booster:
A niche represents an organism’s functional role and place in an ecosystem.
Desert locusts tolerate high temperatures and arid conditions.
Vallisneria in pond shows only habitat, not niche.
Aphid and plant root is not a typical habitat-niche pair.
Vultures and forest only describe feeding behavior, not a specific ecological niche.
Additional Information:
(a) Describes habitat, not complete niche.
(b) Feeding behavior, not niche.
(c) Aphids usually feed on shoots, not roots.