Which of the following terms is used to describe the process of using only the resources available on a farm while avoiding damage to the land and maintaining its viability?

Cause of he different elevations  hope this ?

I'm hella smart but i dont know that

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, it’s awesome
: )