Explain why taking a wolf out of a temperature forest ecosystem could cause thrre to be less trees

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. 

D. a mountain abd are made by volcanos and tectonic plates

Yes what can i with