Either, carbon, hydrogen, nitrogen, oxygen, phosphorus, or sulfur. I would go with carbon because of the photosynthesis and cellular respiration<span />
Sounds like ADD (<span>Attention-Deficit Disorder).</span>
Answer:
the defention of environment is the surroundings or conditions in which a person, animal, or plant lives or operates
Explanation:
because the natural world, as a whole or in a particular geographical area, especially as affected by human activity.