Answer:
1a. Sewage is a liquid byproduct or waste that is carried through a system for treatment.
1b. Local wildlife and such would begin to die and dissipate and the rivers water, untreated would become unviable.
A behavior must affect an organisms fitness and have a genetic basis.
Answer:
I would say by looking in a book.
Explanation:
If Abby wants to know HOW to find it, she will most likely find a book filled with information as to where it's located will be the most help. Hope this helps!
I believe the answer is carbon dioxide. Please let me know if i can help with anything else
Continents move because the earths plates keeps pushing against eacother and over