Population ecologists are primarily interested in . a. understanding how biotic and abiotic factors influence the size of groups of interbreeding individuals. b. how humans affect the size of wild populations of organisms. c. studying interactions among populations of organisms that inhabit the same area. d. how gene pools of populations change over time

a. understanding how biotic and abiotic factors influence the size of groups of interbreeding individuals.

Explanation:

Several factors, such as abiotic and biotic factors can influence the size of any population of species interbreeding in any environment. Abiotic factors include the non-living components in the environment such as temperature, light, climate, nutrients, while biotic factors are the living components of an environment, such as food, fungi etc. Abiotic and biotic factors prevalent in an environment, places a limit to the population growth of any species of organism.

Therefore, the primary concern of population ecologists are understanding how these biotic and abiotic factors can limit the growth and size of the population of any organism species.