The answer is A or the first one
 
        
                    
             
        
        
        
Where are the answer options and a picture of the problem?
        
             
        
        
        
Tendons :may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure. A ligament: is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.
 
        
                    
             
        
        
        
Answer:
Plasma membrane is the semi-permeable membrane that allow the movement of some selected particles only against the concentration gradient or along the concentration gradient.
Different substances can be move through the diffusion, active process and passive process. The hydrogen in the vesicle has been moved through the facilitated diffusion.  In this process, the hydrogen ions will move along the concentration gradient without the requirement of energy but requires the channel protein for its transport.
 
        
             
        
        
        
<span>A book contains letters, just like the DNA. It's how the letters are arranged-into words in a book- that makes them mean anything. The same is true of DNA bases. It is how they are arranged that makes them significant.</span>