A) edge species
B) pioneer species
C) keystone species
D) umbrella species
Correct Answer: C
Solution :
The animal species controlling the ecosystem functioning is known as keystone species. These are the species that has a disproportionately large effect on its environment relative to its abundance. Such species are described as playing a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and number of various other species in the community.
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