Based on the principles of convection, conduction and thermal radiation, which scenario below is most similar to the following situation? You put a heating pad on your back after exercising.
Question 20 options:

Feeling a metal wire get warmer as you roast a marshmallow over a fire.

Warm air rising in a room where the air is moving.

The sun warming up the roof on a house.

Cold water sinking in a pot of water being warmed up on the stove.
Question 21 (1 point)