Question

39 an ecosystem is
a all the populations in an area interacting.
b physical area in which a population lives
c a system where living and nonliving factors interact.
d a group of the same species, all capable of interbreeding.

Explanation:

• Option A: All populations in an area interacting describes a community, not an ecosystem.
• Option B: A physical area where a population lives is a habitat, not an ecosystem.
• Option C: An ecosystem is defined as a system where living (biotic) and non - living (abiotic) factors interact. This matches the definition of an ecosystem.
• Option D: A group of the same species capable of interbreeding is a population, not an ecosystem.

Answer:

C. a system where living and nonliving factors interact.