D! They are both decomposing dead organic matter and metabolizing it through certain pathways to obtain energy! Hope this helped :)
The carbon atom has unique properties that allow it to form covalent bonds to as many as four different atoms, making this versatile element ideal to serve as the basic structural component, or “backbone,” of the macromolecules.
The answer is
A
Behavior isolation is behaviors involved in mating which could also cause it to prevent mating
