Solar panels, windmills, hydro energy
        
             
        
        
        
 Answer:
Tbh they come from the Male sperm and the Female egg. Once the sperm fertilizes the egg then you have a baby! That's the short and simplified answer
Explanation:
 
        
             
        
        
        
The answer is A because with rna G and C always go together and A and U always go together
        
             
        
        
        
Scientists and biologists study the world using experimentation. This can be done through observation, or by performing scientific tests in a lab. 
 
        
             
        
        
        
I think its a and b, but i dont know what kind of rock it is. my guess is a metamorphic or sedimentary.