Winds weakened. Humidity decreased. Air pressure dropped. Temperatures increased.
I gave my students this multiple choice question: Juan noticed that sunny skies suddenly became stormy. Which most likely happened when the weather changed in this way?

Only one answer is correct among these 4 choices:
- Winds weakened.
- Humidity decreased.
- Air pressure dropped.
- Temperatures increased.

Could you tell me which one is correct?

Air pressure dropped.