Mutation can cause instant adaptation while natural selection is the process by which adaptation occurs over a series of generations.
 
        
             
        
        
        
Explanation:
an individual animal, plant, or single-celled life form.
 
        
                    
             
        
        
        
Epigenetic changes are those which do not involve alterations in the DNA sequence. These are caused due to interaction of the genome with the environment.
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When are alterations epigenetic?</h3>
- Epigenetic modifications or tags include DNA methylation and histone modification.
- These changes alter DNA accessibility and chromatin structure thus regulating gene expression.
- These are the reversible, heritable changes which do not change your DNA sequence, but they can change how your body reads a DNA sequence.
- These are necessary for the normal development of organisms.
- Stable, long-term epigenetic modifications involve DNA methylation.
- Flexible, short-term changes involve histone modifications, such as methylation and acetylation. 
Learn more about epigenetic changes here:
brainly.com/question/25660175
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Answer:
third choice is the right answer