Please choose the correct answer to the question: A glacier is a slow moving river of ice. How does a glacier help create soil?

Answer1: It scrapes small particles off large rocks. Answer2: It carries plants down mountains and to oceans. Answer3: It melts and becomes part of streams and rivers. Answer4: It freezes small particles of dirt to form large rocks.

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