Explanation:
In population genetics, the term evolution is defined as a change in the frequency of an allele in a population. ... The allele frequency within a given population can change depending on environmental factors; therefore, certain alleles become more widespread than others during the process of natural selection.
 
        
             
        
        
        
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. ... Most DNA is located in the cell nucleus
 
        
                    
             
        
        
        
The answer is 1 astronomical unit
        
             
        
        
        
Given what we know, we can confirm that Salt marshes are an example of an ecosystem service. 
<h3>What is an ecosystem service?</h3>
This describes situations in ecosystems that are beneficial to human life. This example describes the way in which salt marshes provide humans with a steady and stable source of fish that are important to the fishing industry. 
Therefore, we can confirm that the Salt marshes are an example of an ecosystem service. 
To learn more about ecosystems visit:
brainly.com/question/1673533?referrer=searchResults
 
        
             
        
        
        
1. Protection of water resources.
2. Soils formation and protection.
3. Nutrient storage and recycling.
4. Pollution breakdown and absorption.
5. Contribution to climate stability.