The answer would be a. Energy stored in chemical bonds :)
        
             
        
        
        
Answer:
i think the first one, Kelp forest act as ecosystem engineers 
Explanation:
if im wrong im sorry
 
        
             
        
        
        
Like all other heterotrophs, it eats and  goes through cellular respiration.
        
             
        
        
        
Answer: cell tissue organ and organ system.
Explanation:
 
        
             
        
        
        
Here, you go:
Answer:
<u><em>Generation of B Cells. The immune system is remarkable for its ability to respond to a great many antigens.</em></u>
Explanation:
<u><em>These cells make antibodies which defends and fights out viruses in our bodies.</em></u>
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<em>~Hope This Helps~</em>