I think the best explanation to this is that plants will do everything to get sunlight thats why they move in order to get more. I hope you are satisfied with my answer and feel free to ask for more if you have questions and clarifications
Answer:
A) a single variable
Explanation:
An appropriately designed experiment usually involves only one independent variable. This allows the scientist to truly determine whether the variable manipulated is what had an effect on the subject. You may test more than one variable, but this is usually done or experimented separately, or one at a time.
Evolution, hence adaptations to survive.
C. daughter cells from meiosis are not identical from parent cell
