Question

multiple - choice question
population density is:
how smart the squirrels are.
how many squirrels are in the area.
how many different types of species are in the area.
rewatch

Explanation:

Population density refers to the number of individuals (in this case, squirrels) per unit area. The first option is about intelligence (not density), the third option is about species diversity (not density).

Answer:

How many squirrels are in the area.