An ecosystem is all the populations of organisms that live together and
Athe microorganisms that depend on them.
Bthe organisms that generate energy from sunlight.
Cthe physical factors with which they interact.
Dthe food that they take in as energy.
Athe microorganisms that depend on them.
Bthe organisms that generate energy from sunlight.
Cthe physical factors with which they interact.
Dthe food that they take in as energy.