Question: Fish can live in lakes that are frozen because liquid water remains below the ice at the surface. Which of these describes a property of water that allows some liquid water to remain in frozen lakes?

  Options: 
 A. Water can dissolve many different substances.
 B. Water is less dense as a solid than as a liquid.
 C. Water has a Mohs hardness of about 2 when it is frozen.
 D. Water holds less air at higher temperatures.
Answer: B