How did egypt’s natural borders protect the country from invaders?

The natural borders of Egypt protect the country from invaders because the Mediterranean Sea and the Nile Valley that surrounded Egypt makes the people of Egypt live in peace and harmony. Also Nile Valley is the only source of irrigation of Egypt. 

Egypt's natural barriers protected the country from invaders because it was defficult for the possible enemies to go through the sea and desert.

Explanation: Egypt is surrounded by the Mediterranean sea in the north, the Nile river in the upper south part and deserts in the east and the west. These natural barriers protected Egypt's borders from possible invations by enemy countries. It was difficult for the invaders to go through seas and deserts in order to reach the country.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.