How do rivers most affect New Mexico

A By making the climate hot and arid
B By making farming and ranching possible
C by forming the states major boundaries
D by filling the numerous lakes found thought out the state

This is kind of confusing and I don’t know why please help me

2 answers

What are rivers made of? What is that mainly used for?
1. In which region of the United States is New Mexico located?
(Answer: D. Southwest)
2. How do rivers most affect New Mexico?
(Answer: B. By making farming and ranching possible)
3. Which physical feature shapes the land both throughout New Mexico and much of the southwest?
(Answer: A. Great Plains