Please choose the correct answer to the 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?

Answer1: Water can dissolve many different substances. Answer2: Water is less dense as a solid than as a liquid. Answer3: Water has a Mohs hardness of about 2 when it is frozen. Answer4: Water holds less air at higher temperatures.

Answer format: answer1/answer2/answer3/answer4
Answer: answer2