Question

10 spiders / square meter is an example of
a population size.
b population dispersion.
c population density.

Explanation:

Population size refers to the total number of individuals in a population. Population dispersion is about how individuals are spread out in an area. Population density is the number of individuals per unit area. Here, 10 spiders per square meter is a measure of number of individuals (spiders) per unit area (square meter), which fits the definition of population density.

Answer:

C. population density.