<span> Its not the first one for sure. All the other ones seem right. Sorry I couldn't be much help. </span>
        
                    
             
        
        
        
Food is pushed through the digestive tract by muscle contractions called
<span>peristalsis.</span>
        
             
        
        
        
The answer is d.) tropomyosin will be moved out of the way and muscle contractions will not occur.
        
                    
             
        
        
        
it’s B because he’s doing 2 different things