The diagram shows how heat is being transferred through a room.

A diagram.Short description, A diagram.,Long description,
The diagram shows the inside of a house. Two arrows make a clockwise circle, showing how heat rises, cools, falls, warms, and rises again in a circular motion in the room.

Question
What process is heating the air in the room?

Answer options with 4 options
A.
Convection currents are moving heated air through the room.

B.
Radiation of electromagnetic waves is moving heated air through the room.

C.
Refraction off the window glass is causing the air molecules in the room to be heated.

D.
Conduction is transferring heat directly from one air molecule touching another air molecule in the room.