If an organism has a vestigial structure, that structure likely once had a function in an)
early ancestor
close relative
unrelated organism
embryological stage

this website is for anybody really not just for girls just saying, also while a lot of males are mean and you know there are the few who are kind and then there's the nice-guys but then theirs also guys like me who are shy we don't get out much because there are people like you who exist who would most likely punch a guy in the face so next time just think about things before you post them to a website where guys and girls can see your question.

the answer is "a.) well–developed vascular system."

explanation:

nucleus

would be most reasonable answer tbh

black

lasagna

lunch

math