A lighthouse keeper stands at the top of her 175ft tall lighthouse and spots a fishing
boat in the distance at sea. She estimates
the boat is about 2640ft off shore. What is
the measure of the angle of depression
from the keeper to the fishing boat?

Answer the collision of tectonic plates;

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

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. 

Answerseasonal dry and wet winds this answer is right outta of the book