Answer:
C. Trees
Explanation:
Trees can be replanted and we can grow more, even though it takes a long time this still makes them a renewable source.
It's declarative hopes this helps if im wrong then im stupid :)
A testable question is B. If a plant is turned upside down, which way will the roots grow?
The other options are incorrect because you cannot create some kind of experiment to prove them right or wrong.
Hope that helped you.
A DNA test would fit this situation best. If the male samples are related, it will show up in the DNA test results.
