Question

bones are hard in nature give reason​

Answer 1

Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body.

Answer 2

$\huge {\boxed {\mathtt {\underline \color{gold}{ ANSWER :- }}}}$

Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body. Compact bone is the solid, hard outside part of the bone.

_____________________________

$<marquee \: behavior = alternate><font \: color=gold>- Itzgod❗$