Answer:
where is your other answer choices?
Explanation:
 
        
             
        
        
        
My Answer: Vestigial organs
Why?: " Vestigial organs are physical structures that were fully developed
and functional in an ancestral group of organisms but are reduced
and unused in the later species."
Hope I helped! :D
        
             
        
        
        
Id say family functions are never normal u did not put optionsXD next time u shuld