Many disorders are caused by stress
The diaphragm, next time just google it lol
The answer is D since doing more physical activity creates more energy and help people benefit from the exercise
It best described as Changing, through life
for Example :
The older we are, the less we need caloric intake because we do a lot less physical activity
But when we're old our need for fiber intake will increase because we can't digest our food like our younger days
