The answer is A 
Using energy
        
             
        
        
        
The answer to this certain question is gonna be the letter C- PANCREAS
        
             
        
        
        
An enzyme, it catalyzes the reaction to convert carbon dioxide into carbonic acid
        
             
        
        
        
I believe that an adjuvant is a chemical addictive that increases the effectiveness of vaccines. It is a pharmacological or immunological agent that modifies the effect of other agents. It may be added to a vaccine to modify the immune response by boosting  it such as to give a higher amount of antibodies and a longer lasting protection, and hence minimizing the amount of the foreign material or vaccine injected.
        
             
        
        
        
Answer:
The xylem is located in the root, stem and the leaves of a plant.
The xylem contains dead cells arranged end-to-end forming continuous vessels. They have a hollow central space (lumen)  through which water passes. They walls contain lignin. 
The xylem carries water and minerals, up from the roots to the rest of the plant.