Photosynthesis is when plants turn light from the sun into food (energy). The light from the sun is turned into energy by using chlorophyll. Chlorophyll absorbs blue and red light to turn Co2 and H2o into glucose.
It would be the pubis bone.
I believe the answer is commensalistic because it wouldnt be parasitic because the other isnt getting harm and its not mutual because both aren’t benefitting from it