Question

1. what does population density tell us that population size does not?

the number of individuals in the population
the age distribution of the population (relative to the total area)
the area of the habitat (relative to population size)
the total area the population inhabits

Explanation:

Population size only counts total individuals, while population density is calculated as $\frac{\text{population size}}{\text{habitat area}}$. This means density directly relates the number of individuals to the area they occupy, which population size alone does not convey. The correct option reflects this relationship between habitat area and population size.

Answer:

the area of the habitat (relative to population size)