B. an increase in the overall temperature of the Earth
I say this because the polar ice caps on the poles are melting (which is why the polar bear is now endangered.) and are a result of global warming.
Answer: projection.
Explanation:
A map projection is one of the various techniques used to flatten a spherical globe's surface into a plane sheet to create a map.
This process is a mathematical process because transformation of the locations from the surface of the globe is done by considering the latitudes and longitudes of locations into the locations on a plane.
Hence, a mathematical process for transferring locations from a globe to a flat map is a <u>projection.</u>
People generally move in climates where it's warm, but not too hot. That way they can hunt, raise livestock, and grow food for everyone. Also, it's just a nice climate in general to stay in. Hope this helped :)
