Concept:The specific role played by a species in its environment is called its ecological niche.
Explanation:The niche describes the functional position of the species in its ecosystem.
It includes how the species obtains food, reproduces, and interacts with other organisms.
It also covers the effect the species has on its surrounding environment.
A habitat refers only to the physical place where the species lives, such as a forest, river, or pond.
A habitat does not explain the role of the species within the ecosystem.
A trophic level shows the feeding position of an organism in a food chain.
Examples of trophic levels include producers, primary consumers, and secondary consumers.
A biotic community is the total group of living populations that share a particular area.
Among the options, only the niche represents the specific role of the species in its environment.
Therefore, the correct choice is the niche.
Answer:B. niche