Answer:
A. A keystone species
Explanation:
The prairies dog is an animal that might not seem as the most important in its ecosystem because it is a small mammal, which doesn't seem to have any great effect on things. In reality, it is the total opposite of it, as the prairie dog is a keystone species in its ecosystem. Its activity results in movement of the water, fertilizing of the soil, making the soil more porous, contribute to the growth of the new vegetation, thus in a way the prairie dog is the key figure in its ecosystem. The species that have such important roles, or rather key roles in the supporting of the ecosystem are called keystone species.
