What is the difference between a population and a community? a. a population is a group of various species living in the same place and interact with each other; a community is all members of the same species living in the same place at the same time b. a population is a group of organisms that are closely related; a community is all members of the same species living in the same place at the same time c. a population is all members of the same species living in the same place at the same time; a community is a group of various species living in the same place and interact with each other d. a population is all members of the same species living in the same place at the same time; a community is a group of organisms that are closely related