D. Greenhouse gas feddback
I'm not for sure but I believe this is the answer sorry if I get it wrong in advance
Answer:
The water cycle
Explanation:
All our sources of fresh water, like rivers, wells, and aquifers, are dependent on <u>the water cycle</u> to replenish and maintain themselves.
Oil is one of Saudi Arabia's major exports.
It isn't really a country but it is located in Egypt around 153 miles southwest of the center of Cairo.
