The Egyptian empire began to crumble in the 6th century B.C. when it was first attacked by the Babylonians. However, the Pharaohs were officially wiped out when the Persians killed Pharaoh Psamatik III.
Since this is a multiple choice question, I would choose C, Babylonians.
Natural increase is the difference between the number of births and number of deaths during a year. As it is a natural increase it means there are more births then deaths in a year increasing the population.
Between the 1870s and 1900, Africa faced European imperialist aggression, diplomatic pressures, military invasions, and eventual conquest and colonization. At the same time, African societies put up various forms of resistance against the attempt to colonize their countries and impose foreign domination.
