Question

which series represents the flow of thermal energy in a home with a refrigeration cooling system?
inside air → coolant in cooling system → outside air
fuel → air inside piston chamber → piston movement
inside air → outside air
fuel → inside air

Explanation:

A refrigeration cooling system works by absorbing thermal energy from the inside air (using a coolant). The coolant then releases that thermal energy to the outside air. The option "Fuel → air inside piston chamber → piston movement" is related to an engine (not a cooling system). The option "Inside air → outside air" ignores the role of the coolant in the refrigeration system. The option "Fuel → Inside air" is incorrect as fuel is not directly transferring thermal energy to inside air in a refrigeration cooling system.

Answer:

Inside air → coolant in cooling system → outside air