Answer:
Leave empty
Explanation:
Water is uncountable, so definitely not "a" or "an".
We're left with either leaving it empty or "the". But "the" suggests that it's not just any water, but some type/body of water in particular, which is not the case.
Water is essential to life.
Answer:
the last 2 highlighted sentences. Both explain how even though she thinks she's not worthy of the job she's going to do it anyway for the sake of spreading information and awareness