Answer:
Sun
Explanation:
All energy comes from the sun. 
 
        
             
        
        
        
Answer:
4
Explanation:
because it needs all the other stuff
 
        
                    
             
        
        
        
Because children pick up on what they see and copy it, it is how they learn 
genetics because of the traits passed down to them
        
             
        
        
        
Mutation causes change in an organisms DNA, resulting in a change in all aspects of the organisms life. It affects how the organism looks, and how it behaves. If there was no mutation, an organism could not change, therefore there wouldn't be evolution at all.
        
                    
             
        
        
        
Answer:a positive feedback
Explanation: positive feedback is a type of feedback mechanism employed by the body,in which an output is enhanced or acclerated.
In contrast to negative feedback where the body regulates it's internal conditions by reducing the effect of a stimuli,In positive feedback ,the body enhances the effect of the stimuli.
It is not common as negative feedback in homeostasis.
An example is the increasing release of oxytocin to promote contractions during childbirth,until the child is born.
Another example is the accumulation of blood platelet , in the site of blood vessels injury to 
cause blood clotting.