Please choose the correct answer to the question: Sharpening a pencil and tearing paper are examples of physical changes. Which statement describes why these are physical changes?

Answer1: There is a change in how the objects are used. Answer2: There is a change in the appearance of the objects. Answer3: There is a change in the materials from which the objects are made. Answer4: There is a change in both the appearance of the objects and the materials from which they are made.

Answer format: answer1/answer2/answer3/answer4