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: There is a thunderstorm close to your house. The windows rattle at the same time that you hear the thunder. What causes the windows to rattle?
Sound waves from the thunder
The wind from the thunderstorm.