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.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;