Biology

The correct answer is A.Keystone Species.

A keystone species is one that has a disproportionately large impact on its ecosystem relative to its abundance or biomass. This species plays a critical role in maintaining the structure, diversity, and functioning of the ecosystem. Its presence or absence can greatly affect the overall environment and the survival of many other species within the ecosystem.

Explanation of other terms:

B.Herbivores: These are animals that primarily consume plants. While they are important to the food chain, they do not necessarily support an ...