Answer:
A. Layer A is the troposphere and Layer B is thermosphere
Explanation:
The troposphere is the lowest layer of the atmosphere. THis is where all life life resides and where weather occurs as well. It contains the air we breathe. As we go higher in the troposphere, the temperature goes down. 
The thermosphere is part of our atmosphere but it is very high up and considered to be part of outerspace as well. It is heated up by the UV rays and X-rays that it absorbs. 
 
        
                    
             
        
        
        
I think the correct answer would be sexuality
        
                    
             
        
        
        
Aerobic means “with oxygen” and anaerobic means “without oxygen”
        
                    
             
        
        
        
Answer:
 absorbed by the neuronal cells of the brain where the glucose is quickly broken down to create ATP. 
Explanation:
 
        
             
        
        
        
Answer:
The pigs individual number