Fact 1: An earthquake causes the ground to shake.

Fact 2: Examples include damage to man-made structures, ground failure and felt shaking.

Given the two facts above, answer the question "What causes damage to man-made structures?" with the following options: 
- flooding
 - air quality
 - animal crossings
 - earthquakes
 - toxins
 - trees bending
 - influenza
 - Pesticides


 

    earthquakes     