The answer is A. Chlorophyll
        
                    
             
        
        
        
Answer:
secrete a cytokine that triggers apoptosis
Explanation:
Cytotoxic T cells secrete granzymes and perforins when targeting cells. Additionally they secrete cytokines such as IFN-, TNF-α and TNF-β that act to activate macrophages and help kill infected cells.
 
        
             
        
        
        
Answer:
The answer would be A. Earthworms burrowing in the ground