Answer: the answer is C, a list of all the sources used to write a report.
Tropics- Most tropics are close to the equator, much hotter than any of the polar zones
Temprate- located in areas including the us, europe australia any place in the middle of the equator ir eaither polar zones
Polar- Explaintory! Antarica and North Pole! Coldest place on earths
A.) Professional and Amateur