The answer would be both. Photosynthesis requires energy and produces food, cellular respiration breaks down food and releases energy. Plants use both humans use just cellular respiration.
Independent variable: is the UV light exposure
Control group: people not exposed (sample b)
Dependent variable: skin cancer
Experimental group: (sample A)
Answer: Deforestation is bad for mother nature. The reason for this is because deforestation is cutting down trees and in that way we are destroying mother nature's gifts to us.
