I think it is D I’m not sure
        
             
        
        
        
Fungus because it is a living thing in its own right as opposd to a brain cell which is part of an organism.
        
             
        
        
        
Explanation:
This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond. An atom that loses one or more valence electrons to become a positively charged ion is known as a cation, while an atom that gains electrons and becomes negatively charged is known as an anion.
 
        
             
        
        
        
there are 88 constellations in total