How did the government of egypt change the natural state of the nile river?
a. they constructed the aswan dam to eliminate seasonal flooding.
b. they diverted the river to cairo to increase the city s water supply.
c. they increased the size of the floodplain to increase agricultural yields.
d. they constructed chinampas along the river to increase arable land.

The answer is a. They constructed the Aswan Dam to eliminate seasonal flooding.

The Aswan Dam or Aswan High Dam was built from 1898-1902. It was primarily built to control the floods in the nearby areas of the river. Consequently, the dam also became useful for providing water for farmers and generating hydroelectricity. The dam releases around 55 km^3 of water a year, 46 km^3 of which are used for irrigation.

No it is an oblate spheroid apparently