Answer:
make blood cells
Explanation:
The red blood cells are made from the bone marrow of bones.
Smooth muscles form organs like the bladder and the stomach and allow them to change shape in order to perform their respective functions. Smooth muscles have nothing to do with bones.
The autonomic nervous system controls the functions of the body such as digestions, arousal, etc. It is a system of nerves, not bones.
Tendons connect muscles to bones, not synapses.
Hence, the correct option is the bones make blood cells.
