Answer:
B.
burning of fossil fuels
it increase the amount of carbon present in atmosphere. 
 
        
                    
             
        
        
        
Unlike women, men do not experience a major, rapid (over several months) change in fertility as they age (like menopause). Instead, changes occur gradually during a process that some people call andropause. Aging changes in the male reproductive system occur primarily in the testes.
        
             
        
        
        
If its a mutiple choice question ya got then VITAMINS should be the answer
        
             
        
        
        
For the first question-a bicep is a large muscle in the upper arm which flexes the arm and forearm, a tricep is a large muscle at the back of the upper arm and a deltoid is a thick triangular muscle covering the shoulder joint and used for raising the arm away from the body.
        
             
        
        
        
The correct answer would be B