Please choose the correct answer to the question: A girl signals her friend by shining a flashlight on a mirror. Her friend can see the signal because

Answer1: heat energy can be transferred from one object to another Answer2: mechanical energy can be transferred from one object to another Answer3: sound energy can be reflected from one object to another Answer4: light energy can be reflected from one object to another

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