Question

How did Egypt’s natural borders protect the country from invaders?
A.The desert was difficult for invaders to cross.
B. The Nile Delta made it difficult for invaders to attack from the coast.
C. The desert completely isolated Egypt from other populations.
D.The Nile River’s flooding pattern confounded invaders.

Answer 1

One way in which Egypt’s natural borders protected the country from invaders was that "B. The Nile Delta made it difficult for invaders to attack from the coast," although the vast desert also played a role. 

Answer 2

The Nile Delta made it difficult for invaders to attack from the coast. Thus,  Egypt’s natural borders protected the country from invaders. Option B is correct.

The Nile Delta is the delta formed in Northern Egypt (Lower Egypt) where the Nile River spreads out and drains into the Mediterranean Sea. It constitutes one of the world's largest river deltas extending from Alexandria in the west to Port Said in the east.