Which factors would act as push factors for migration? A.
Low unemployment
OB.
Inexpensive housing
Free education
D
Desertification

Answer the government provides "unemployment insurance"

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city. 

Yes what can i with

Intrusion is the best answer and the newest form.