Please choose the correct answer to the question: Which is an example of water condensing?

Answer1: A puddle disappearing on a hot summer afternoon Answer2: Sweat forming on your forehead after you do a lot of exercise Answer3: Ice cubes melting when you put them out in the sun Answer4: Dew forming on plants during a cold night

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