Answer:
A
Explanation:
Well, the human skeletal system produce red blood cells into and for the body.
carbon and hydrogen must be present. o is oxygen. 2h and 1o is water. 2c is carbon dioxide. h and o and c is water and carbon and o is oxygen. hoc-o is h and c.
Answer:
The hardness is more than 2.5. Hope this helps.
It would have to be physical property * if this helped you in anyway please be sure to leave a thanks:)