Which term would be directly related to the science of ecology?

population density

circulatory system

genetics

taxonomy

last one i think?

Answer: population density

Explanation:

Yes! all because ecology seeks to understand the relationship between living organisms (plants, animals, microorganisms) and their environment while population density refers to the number of individual organisms in a unit area of space.

That is, Population density = Total population ➗ Area of habitat

Thus, population density is related and also a subset of ecology.