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What is the iris?

the protective layer over the eye
the nerve at the back of the eye
a muscle that reacts to light by contracting
it controls color blindness

Respuesta :

TerrTerr

Answer:

the colored part of the eye which helps regulate the amount of light entering the eye

Explanation:

the Iris uses muscles to change the size of the pupil.
A the protective layer over the eye

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