1. name and describe the layers of the earth. how do these layers affect earthquake waves? how do earthquake waves us to know what earth’s interior is like?

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. 

That is the correct answer to the question, why is the southern portion of the ring of fire so complex?

The correct answer for this question is this one:
" (3) adirondack mountains" the  geologic feature that is composed of the
youngest crustal bedrock is the  adirondack mountains. hope this answer your question. have a great day ahead.