Which description is most comparable to the convection currents that exist in earth’s mantle?
a. hot air rising and cold air sinking
b. cold water rising and hot water sinking
c. the sun rising and then setting 14 hours later
d. random distribution of temperatures
e. hot air sinking and cold air rising

The answer is going to be A because 
*Convection currents in Earth's mantle are caused by the rise of hot material rising towards the crust, becoming cooler and sinking back down. This process occurs repeatedly, causing the currents to constantly flow. The movement of the currents plays a factor in the movement of the mantle.

This country likely has a high total fertility rate (tfr).