You are presented with the question "What can damage plumbing?" and the following answer choices: 
- several different ways
 - an automobile engine
 - Breathing too fast or too slow
 - smallest agents of disease
 - fissures of hot, acidic water
 - volatile substances
 - tectonic plates being pushed together
 - erosion from rivers

Now knowing that tectonic plates being pushed together causes earthquakes and plumbing is sometimes damaged during an earthquake, choose the best answer.


 

       tectonic plates being pushed together  