Which phrase defines a community?

The phrase that best defines a community is a group of several populations living in an area.

Explanation:

A community of the Earth is detected when several populations living in an area, such as giraffes, deers, penguins, hippos, rhinos, and birds (seagulls, eagles, hawks, and more).

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme