What part of the eye gives it its color?

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Tags

1. #light
2. #diameter
3. #irides
4. #retina
5. #plural
6. #mammals
7. #reaching
8. #amount
9. #controlling
10. #responsible
11. #circular
12. #birds
13. #color
14. #pupil
15. #humans
16. #irises
17. #defined
18. #structure