Natural Selection, unless you were born in a lab which would be unnatural/artificial, and not too likely with today's technology. (Maybe one day.)
        
             
        
        
        
Angiosperms have ovaries; gymnosperms do not.
        
                    
             
        
        
        
The Sun is the energy source for almost all life on earth.
        
                    
             
        
        
        
Answer:
Here you go :)
Explanation:
Plant roots complete a cycle in the soil. The deeper they go, the more benefits they provide to soil fertility and stable carbon storage in soils. While alive and active, roots redistribute carbon and nutrients throughout the soil profile.