You are presented with the question "What is essential for evolution to occur?" and the following answer choices: 
- Changes in DNA sequences
 - Plant reproduction
 - Natural disasters
 - Gamma radiation
 - biological diversity
 - DNA sequences staying the same
 - the environment
 - that material's properties

Now knowing that mutations are essential for evolution to occur and mutations are changes in the DNA sequence, choose the best answer.


 

 Changes in DNA sequences        