The Nile River was a major life source for the ancient Egyptians.
This is just a helpful reminder because i haven’t read the book yet but here’s how you can tell what perspective (POV) it is:
(1st perspective uses:
We, us, our,and ourselves are all first-person pronouns. Specifically, they are plural first-person pronouns. Singular first-person pronouns include I, me, my, mine and myself.)
&
(2nd perspective uses:
you (singular and plural personal pronoun)
yours (singular and plural possessive pronoun)
yourself and yourselves (singular and plural reflexive/intensive pronouns))
&
(3rd perspective uses:
he, him, his, himself, she, her, hers, herself, it, its, itself, they, them, their, theirs, and themselves)
I believe the three terms you are looking for is diplomatic, military, and economic ways.
Answer:
The amount of energy it takes on peoples labor to physically carry water back to their village and worrying about evaportation in hot weather which makes water transportation party weather dependant.
Looking for a clean source of water in the first place is also a tough one.