The air in the atmosphere circulates mainly because conduction is absorbing cold air into hot air radiation is emitting the sun's heat convection is redistributing heat the temperature is uniform around the earth

The correct answer for the blank is-

convection is redistributing heat.

The process by which the heat shifts from a hotter body to a less hotter/ cooler body is called as heat transfer.There are primarily three modes of heat transfer that are conduction, radiation, and convection.

Convection is a mode of heat transfer that causes the air in the atmosphere to circulate. It takes place when air near the warmer sea is heated and rises high due to expansion. The cooler air moves towards the sea shore, leading to the generation of convection currents.

Thus, convection is redistributing heat is the right answer.

b is the correct answer

true                                                                                                       true true true true true true