Which statements are true about polymers? Select all that apply. Polymers are often made from one singular atom. Polymers are long chains. Polymers are short loops. Polymers are often made from repeating units.

The answer is a because - is an direction

Interacting group of various species in a common location. for example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.