Please choose the correct answer to the question: A puppy is sitting in a yard and is at the door, asking to come in. A person looks out the door and sees the pup tremble, so the person can tell that

Answer1: the dog is lonely Answer2: the temps have dropped Answer3: the puppy is happy Answer4: the pup is strong

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