Why might the u. s. study forest fires in mexico?
to study the response time of mexican firefighters during a crisis
to study the regrowth patterns in mexico and plant the same types of trees
to study the use of mexican resources in fire departments
to study the spatial patterning of forests and forest fires and plan for better use of fire
fighting resources in the u. s.
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To study the spatial patterning of forests and forest fires and plan for better use of fire  fighting resources in the U.S.

Explanation:

Wildfires have become a public concern over the last few years, as annual fire suppression costs seriously overtake unrelated forest management, recreation, and research programs. The US can certainly learn different fire management practices from other countries, such as Mexico, and especially to examine the spatial patterning of forests and forest fires to provide better fire fighting resources.

answer; gravity pulls glaciers down hill and as glaciers flow it pick up rocks and soil;

doctrine that the us had the right to expand throughout north america.