Answer:
The Core?
Explanation:
You would think that heat would come from the core but I'm not sure
 
        
             
        
        
        
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
        
             
        
        
        
Well in order for chemical digestion to occur period, a enzyme is needed. 
In the mouth this enzyme is amylase 
        
             
        
        
        
Answer:
For 1. The virus starts in the lungs. From there, the virus invades the bloodstream and spreads to the skin, intestines, lungs, kidneys, and brain. The virus activity in the skin cells creates a rash that starts as macules (flat, red lesions). 
The symptoms after actually catching the virus
 Pain in the back or muscles
 rashes, small bumps, blister, scab, or scar
 You can have fever, malaise, or chills
headache or vomiting Is also pretty common. I hoped this helped bro 
Explanation:
 
        
             
        
        
        
nothing is there what are you talking about