<span>Independent variable: Time plants are watered (ex. 8am, 12pm, 4pm, 8pm, 12am)
Dependent variable: growth of the plant
Controlled variable: 1. same type plants, 2. same amount of sunlight, 3. same type of dirt, 4. same type of water, 5. same amount of water (each are self explanatory of how to control)</span>
I believe the answer is D.
Answer: Giving birth only in the spring and summer ensures that offspring are born when food is most available.
Explanation:
Humans even though i dont believe in evolution but that is the scientific answer