Question

what is the role of the beaver in its ecosystem?
a it is a foundation species and the main source of food for the natural predators of its ecosystem.

b it is a keystone species that modifies its natural environment by damming streams to form wetlands.

c it is a dominant species, as it has the greatest number of individuals among all the mammalian species of its ecosystem.

d it is an endangered species as it has the least number of individuals among all the mammalian species of its ecosystem.

Explanation:

Beavers are keystone species because their dam-building modifies streams into wetlands, supporting diverse ecosystems. They are not foundation species (main food source claim is false), dominant (not most numerous), or universally endangered.

Answer:

B. It is a keystone species that modifies its natural environment by damming streams to form wetlands.