Fact 1: Mutations are essential for evolution to occur.

Fact 2: Mutations Mutations are caused by random changes in genes.

Given the two facts above, answer the question "what is essential for evolution?" with the following options: 
- hurricanes
 - that material's properties
 - remains of prehistoric life
 - the body's largest organ
 - revolutions
 - Plant reproduction
 - natural disasters
 - random changes in genes


 

        random changes in genes 