Question

research findings show that the higher the number of volunteers that show up after a natural disaster, the greater the damage. does this mean that more damages occur because of volunteers?
yes, more volunteers means more damage occurred.
yes, more damage means more volunteers will show up.
no, the likely cause is that the natural disaster also affected the volunteers. so, everyone affected becomes a volunteer to help others who are affected.
no, the likely cause is the size of the natural disaster. a larger natural disaster will imply that more volunteers will show up.

Explanation:

Correlation does not imply causation. Just because there is a positive correlation between the number of volunteers and the damage level after a natural - disaster does not mean volunteers cause the damage. A larger natural disaster likely leads to both more damage and more volunteers showing up.

Answer:

No, the likely cause is the size of the natural disaster. A larger natural disaster will imply that more volunteers will show up.