How did being surrounded by deserts benefit Egypt?

Question

any ideas....?

Answer 1

Protection against invaders such as the Assyrians from Asia.

In the long term (such as modern times) the deserts are not a benefit since it reduced arable land to the strip that the Nile River runs through.

Answer 2

Yes, the deserts were a better defence than the sea.  But while the deserts kept the invaders out, they also kept the natives in - thereby concentrating the populations that were necessary to creating Egypt's great civilization.