Why don't angiosperms need water for fertilization?

The answer is c) a pollen tube grows from the pollen grain into the ovary.

Explanation:

I took the quiz and got it right

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.