Please choose the correct answer to the question: A teacher mixes a small amount of salt in a glass of warm water and asks the students to observe physical changes that occur as the salt dissolves. Which physical change will they most likely observe?

Answer1: The solution will become clear. Answer2: The salt will form bubbles. Answer3: The solution will increase in temperature. Answer4: The water will evaporate.

Answer format: answer1/answer2/answer3/answer4