How did being surrounded by deserts both and hurt egypt

Even though surrounded by desert and sand, Egypt depends on the Nile River. This river sometimes flooded, but also assisted the farmers in farming. Egyptians did not have to worry about desert. The Nile often would deposit quite a bit of rich dark soil called “kemet” in Egypt after a slight flood, one that can’t do a lot of damage. In the outer regions of Egypt, the desert did hurt them by having droughts and damaging dry weather. Nevertheless, the Egyptians formed a way of irrigation, moving water from one place to another.

Ithink it's c selection but i don't really know.