Afternoon clouds form and block the sunlight. A series of tornadoes occurs over a one-week period. An overnight temperature drop causes frost to form. The average amount of annual precipitation decreases.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these events is an example of a change in climate?
Possibilities:
- Afternoon clouds form and block the sunlight.
- A series of tornadoes occurs over a one-week period.
- An overnight temperature drop causes frost to form.
- The average amount of annual precipitation decreases.

The average amount of annual precipitation decreases.