Ok idk if there was a picture that was supposed to go with that cause I don't see one but here are some vestigial structures in humans: Appendix, Pinky toe (debatable possible used for balance) , ear muscles, tail bone, wisdom teeth, nictitating membrane, male nipples (sorry to be gross), and goosebumps. Those are the ones I can remember. Hope this helps!
C) ball and socket is the answer
Basically by planting more trees...
they'll use it for photosynthesis, nd give us Oxygen in return
a) a longer stamen could ensure that an insect brushes an anther and picks up pollen
hope this helps!
