Answer: a compound known as calcium carbonate (CaCO3)
Explanation: Google the question itself
The functions of eyes parts are as follows:
Retina: The rays of light focused on the retina by the cornea and lens. The retina produces an image which is sent along the optic nerve of the brain.
Iris: It changes the size of pupil and allows different amount of life to enter the eyes.
Pupil: The light enters to the eyes through it.
Cornea: It forms the outer coating of the eyeball and covers the iris and pupil.
Lens:
Wood will break down into peat, then will be compressed underground to make coal. Adding more compression will make diamonds.
Answer:
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