Which factor is associated with the protection deserts provided to Egypt?

• A. They acted as barriers against invasion.
• B. They increased river flow.
• C. They caused climate shifts.
• D. They supported dense forests.

Answer: (A)

Deserts work as natural barriers that make invasion and sustained military campaigns very difficult. For ancient Egypt, the Sahara to the west and the arid Eastern Desert formed a wide, inhospitable border that slowed or deterred enemies and protected the Nile Valley where Egyptian society and power were concentrated. This protective role is specific to deserts and doesn’t involve increasing the Nile’s flow, triggering climate shifts in a way that protects a civilization, or supporting dense forests.