Environmental factors do influence natural selection because they can increase or decrease the population of a species, by selecting those with only favorable traits. 
        
             
        
        
        
The obvious answer is a bc it does not use and toxic fuels
        
                    
             
        
        
        
Answer: a blacktop highway
 
        
                    
             
        
        
        
Hallo~~~
When comparing optical and radio telescopes, we know that both of these telescopes detect a certain band of the electromagnetic spectrum. 
When contrasting optical and radio telescopes, we know that optical telescopes have higher equipment (polished mirrors, accuracy), and that they depend on weather. Radio telescopes have lower equipment (less precise reflectors), and depend on diff. things such as thermal radiation and man-made emissions.
 
        
             
        
        
        
Answer:
i am not really sure if you meant how manyhours or is it longeror shorter to make full orbit.
Explanation: