Answer:
Transportation
Explanation:
They can transport substances / nutrients from roots to different parts of the plant which makes the stem important for the plant.
The answer is D because ecology is the study of how the living organism effects its environment
<span>Animal-like protists are called protozoa. Protozoa are single-celled eukaryotes that share some traits with animals. Like animals, they can move, and they are heterotrophs.
</span>
