Question

an ecosystem includes all of the following except
a community.
a biosphere.
populations.
organisms.
nonliving environmental components.

Explanation:

An ecosystem consists of living organisms (including populations that form a community) and nonliving environmental components interacting in a specific area. The biosphere is the global sum of all ecosystems, a much larger scale that encompasses all ecosystems, so it is not part of a single ecosystem.

Answer:

B. a biosphere.