Your answer would be D, Photosynthesis
Hope this helps!
        
             
        
        
        
There's so much confusion going on between<span> the acronyms </span>RER<span> and RQ. At the state of rest the </span>RER<span>, completely known as the </span>respiratory exchange ratio<span>, is actually the same as RQ or </span>respiratory quotient<span>. ... The RQ is a metabolic </span>exchange<span> of gas </span>ratio<span> that is equal to CO2 production over oxygen uptake </span>
        
             
        
        
        
Answer:
a) chlamydia 
Explanation:
Chlamydia causes trachoma and is associated with sexually transmitted diseases
 
        
                    
             
        
        
        
i would say B. pressure imbalances