Question

1. what does the term ecosystem refer to?

a. a community of living organisms and their physical environment

b. a region divided by political boundaries

c. an isolated cultural group

d. a man - made urban area

Explanation:

To determine the correct answer, we analyze the definition of "ecosystem". An ecosystem is defined as a biological community of interacting organisms and their physical environment. Option a matches this definition. Option b refers to a political region, option c refers to a cultural group, and option d refers to an urban area, none of which are related to the ecological definition of an ecosystem.

Answer:

a. A community of living organisms and their physical environment