Please choose the correct answer to the question: Water is a very important part of the physical weathering of rock. Which of these properties of water is most important in causing some of the physical weathering of rock?

Answer1: Water is a liquid at room temperature. Answer2: Water can contain different minerals. Answer3: Water expands when it freezes. Answer4: Water dissolves many chemicals.

Answer format: answer1/answer2/answer3/answer4