Bones will continue to grow and lengthen until what occurs? a. the epiphyseal cartilage is ossified. b. the child turns 18 years old. c. the process of bone remodeling ceases. d. there is only a small amount of epiphyseal cartilage left.

C.) the process of bone remodeling ceases
the reason is because you don't reach full bone density till you are mid twenties and bone remodeling decreases from that time depending on how you preserve your bones.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.