What is the measurement of a population per unit area?

The blank is the measurement of a population per unit area. Overcrowding is a example of Blank

first blank

1: Population Structure

2: Population Density

3: Population size

Second Blank

1: Density - independent factor

2: Positive population growth

3: Density - dependent factor

First blank: Population Density

Second blank: Density - dependent factor

Explanation:

Population density is defined as the number of individuals occupying a place per unit area of that place. Hence, the measurement of population per unit area is otherwise known as population density.

Overpopulation is a density dependent factor in which the maximum number of individuals that is supposed to be in an area has been exceeded.