B . Femur
is youre answer to this question <3 :)
The stomach. The stomach uses both mechanical and chemical means to break down food into chyme and then the chyme travels through the small intestine.
Other possibly contributory lifestyle factors include alcohol consumption, stress, diet, exercise, disease, and medication. In summary, the genetic influences on aging may be highly overrated, with lifestyle choices exerting far more important effects on physical aging.
I think it's D. all of the above
