Question: When heat flows from a hot spot to a cooler spot, entropy increases. When heat is forced to flow from a cool spot to a warmer spot, entropy decreases. Marta is looking for something in her house that causes a decrease in entropy. Which of these should she choose?

  Options: 
 A. an ice cube melting
 B. the refrigerator
 C. an egg frying
 D. the toaster
Answer: B