Carbon ^^ is the answer if I’m not mistakenn
        
             
        
        
        
If I am correct it is The Third Trimester
        
                    
             
        
        
        
Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines  to assist the immune response.
 
        
             
        
        
        
Bones for ur feet and bones for ur head is in ur body