Valentina heated a cup of cocoa in the microwave. When she removed it from the microwave, the cocoa was too hot to drink, so she left it on the counter. Valentina forgot about the cocoa for two hours. When she remembered it, she found that the cocoa was the same temperature as the room. How did the cocoa reach room temperature? The heat from the cocoa was released as friction from the cup.

The heat from the cocoa was transferred to the air in the room.

The cold air in the room was transferred to the cocoa through the cup.

The cold temperature of the counter was transferred to the cocoa through the cup.