Please choose the correct answer to the question: Earth rotates on its north-south axis. Which statement best describes one complete rotation?

Answer1: It takes six months and causes summer and winter seasons. Answer2: It takes 24 hours and causes night and day. Answer3: It takes 29 days, which represents one cycle of the Moon's phases. Answer4: It takes 365 days, which represents one Earth year.

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