Detailed explanation and options for the selected question.
What is the role of keystone species in an ecosystem?
A.
They occupy the largest habitat
B.
They are the most abundant species
C.
They play a critical role in maintaining ecosystem balance
D.
They are at the top of the food chain
Explanation:
Keystone species are crucial for ecosystem balance, often affecting many other species. They are not defined by habitat size, abundance, or food chain position.