Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up?
Water droplets that formed from cooled water vapor in your breath
Your breath condenses on the mirror.