Fact 1: Dropping an object into water causes vibrations in the water.

Fact 2: Water, for example, is a liquid.

Given the two facts above, answer the question "What does dropping an object into liquid cause?" with the following options: 
- Heat energy
 - Energy.
 - vibrations
 - energy
 - no effect
 - atoms do not move
 - nothing
 - evaporation


 

   vibrations      