Answer:
The correct answer is option A.
Step-by-step explanation:
American bison are the bison found in America, these are animals similar to the buffalo. They are dependent on grazing mainly and are often present in clumped in small groups.
This type of spatial distribution of American bison helps in providing better protection from predators by clumped in groups to void risk of getting attack and increase their survivablity. Animals present in groups help one another.
Thus, the correct answer is option A.