Which statement describes a community?

Which statement describes a community?

• A. The rate of photosynthesis in an ecosystem
• B. The sum total of all the living organisms in an ecosystem (biotic only)
• C. The interactions among all species
• D. The non-living physical environment

Answer: (B)

In ecology, a community is the sum of all living organisms in a given area—the biotic components that coexist there. This definition focuses on the organisms themselves and their presence together, not on processes or the non-living environment. That’s why describing a community as the total living things in an area fits best. The rate of photosynthesis describes a process happening within an ecosystem, not the collection of organisms. The interactions among all species are important for understanding how a community functions, but they describe relationships rather than what the community is. The non-living physical environment is abiotic, part of an ecosystem but not the living assemblage that constitutes a community.

In ecology, a community is the sum of all living organisms in a given area—the biotic components that coexist there. This definition focuses on the organisms themselves and their presence together, not on processes or the non-living environment. That’s why describing a community as the total living things in an area fits best.

The rate of photosynthesis describes a process happening within an ecosystem, not the collection of organisms. The interactions among all species are important for understanding how a community functions, but they describe relationships rather than what the community is. The non-living physical environment is abiotic, part of an ecosystem but not the living assemblage that constitutes a community.