A—
This sentence pretty much sums up what the writer of the passage wants to talk about. The other ones do not fit with the sentence “water is one factor that is necessary for growth” and do not fit the idea of the passage, which is what factors affect plant growth.
Answer:
plant life
Explanation:
plant life is the life for all the people in need and for the animals to survive
That sounds really demanding. You know, a lot of responsibilities.
The dog ate some nuts the old lady left
Answer:
You have the question and you have the answer, what more do you want?