It was proposed by a scientist named Charles Darwin.
        
             
        
        
        
Answer:
Fish & algae 
Explanation:
They are both biotic becuase they are living. Light & rocks are abiotic. 
 
        
                    
             
        
        
        
These sorts of studies can help researchers determine the relative importance of nurture and nature in determining a trait. Nature here would refer to genetics passed down to an individual from its parents, whereas nurture refers to the environment the individual is exposed to.
        
             
        
        
        
The answer is b, numerous meaning more in amount