Compared with the size of of Mexico, how big is Canadas Nunavut territory

Since wxyz is 4, halfof that would be 2.

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. 

The answer is filtering so c

The 3rd one