The correct answer is D) yearly flooding the Nile.
Egypt’s Black Land was caused by yearly flooding the Nile.
The black land for Ancient Egyptians was the banks of the Nile River that crossed Egypt. With the flooding of the river that could be prevented by the Egyptians, the black land meant fertile soil, good tp grow crops that benefited so much the people of Egypt. As most of the Egyptian territory was desert, Egyptians had to be careful of growing good crops to feed their families and trade the excedents with other nations,