EVERYDAY SCIENCE

Detailed explanation-1: -Since this definition mentions organisms, Population logically has to include biotic factors. The definition also mentions only organisms interacting with each other, no non-living things, thereby precluding any abiotic factors. Therefore, a Population only includes biotic factors.

Detailed explanation-2: -A community is all of the populations of different species that live in the same area and interact with one another. Which levels of ecosystem include only biotic factors? Populations and communities are levels of ecological organization that contain only biotic factors (living things).

Detailed explanation-3: -Communities. A community deals with the populations of living organisms and how they interact with one another in a specific area. These are considered biotic factors or living factors.

Detailed explanation-4: -For the species, population and community, they only contain biotic or living forms because they are a group of living organisms living together in the same place, while the ecosystem contains both biotic and abiotic forms because this is where the two forms interact with one another.

Detailed explanation-5: -An ecosystem consists of all the organisms living in an area and the nonliving features of their environment. The living organisms are called biotic factors while the nonliving parts of the ecosystem are called abiotic factors.