Please choose the correct answer to the question: Students make weather observations outside the school building, and then they record their observations. Which observation should be recorded as a fact?

Answer1: The air feels very cold. Answer2: The wind is blowing at 5 m/s. Answer3: It is nicer than the day before. Answer4: It looks like it might warm up later.

Answer format: answer1/answer2/answer3/answer4