Question

Red bone marrow is found in

A. calcium.
B. tissue.
C. fat.
D. bone.

Answer 1

It is found in the bones such as hip bone, breast bone, skull, ribs, vertebrae and shoulder blades, and in the cancellous ("spongy") material at the proximal ends of the long bones femur and humerus. 

Answer 2

D. Bone.

I hope this helps. :)