Why did egyptians know a lot about the body
a. becuse osiris came to them in their dreams
b. becuse they work on mummies
c. beuse they ofen performed sugery
d. becuse they whee astronomers

The ancient Egyptians were able to gain a lot of knowledge about the human body because before mummification, they would open the body and remove many organs. Therefore the answer is B.

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.