Is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem.

the variety of species in a community.

Explanation:

A species is a group of similar organisms that can mate and produce fertile offspring. a population is a group of organisms of the same species in an area. whereas a community is the populations of all of the different species or variety of organisms in an area.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.