Early civilizations changed their natural environment by :

Early humans changed their environment through the domestication of animals, hunting and irrigation, Wing said. ... Many may not realize how extensively early settlers changed the environment, mainly because of persisting beliefs that primitive societies kept the land intact and lived simply with nature

Explanation:

b.

explanation:

he is racist

"oh, lets coppy china and build a great wall around bla bla bla.that way,we wont lose out to other countries." in the end, he did not build anything