Answer:
Complex carbohydrates are MADE up of sugar molecules that are strung together in long complex chains, complex carbohydrates are found in food like peas, beans, whole grains and vegetables. 
Explanation:
Both SIMPLE and COMPLEX carbohydrates are turned into glucose (blood sugar) in the body and are used as energy. 
I really hoped this helped some, I tried to make it specific :[ 
 
        
             
        
        
        
Its basically saying something (object) at rest is going to stay there until something moves it like an outside object.
        
             
        
        
        
Answer:
It prevents their species from going extinct. 
 
        
                    
             
        
        
        
Answer:
Natural selection
Explanation:
Natural populations have variations. Organisms of a population have various genetic traits. Some of these genetic variations make the organisms better suited to the prevailing environmental conditions. These organisms are more likely to produce more progeny. Over generations, the frequency of the beneficial genetic traits increases in the population due to the higher reproductive success of the organisms with these genetic traits. 
This process of differential fitness of organisms of a population where the organisms with adaptive genetic traits have survival and reproductive benefits is called natural selection.