Fact 1: An earthquake causes the ground to shake.

Fact 2: Earthquakes Earthquakes are very deadly.

Given the two facts above, answer the question "what is very deadly?" with the following options: 
- respiration
 - drinking h2o
 - smoking tobacco
 - smoking cigarettes
 - cigarettes
 - digestion
 - the ground shaking
 - influenza


 

       the ground shaking  