Q: The purpose of any cooling system is to transfer what type of energy in order to keep things cool?


Read this paragraph and choose the correct option from the provided answers:

A refrigerator is an example of a cooling system. Another example is an air conditioner. The purpose of any cooling system is to transfer thermal energy in order to keep things cool. A refrigerator, for example, transfers thermal energy from the cool air inside the refrigerator to the warm air in the kitchen. If you’ve ever noticed how warm the back of a running refrigerator gets, then you know that it releases a lot of thermal energy into the room.

 Choices:

- radiation

- atmospheric

- physical

- thermal


A:
thermal