PLEASE HELP A STRANGER OUT :(

the answer is 100% density i've answered this question before and done the quiz myself.

mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. weight is the measure of the force of gravity on an objects's mass, while mass is the measure of how much matter there is in an object.

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;