What is the colored, circular structure around the pupil?

it is the Iris

Explanation:The iris in humans is the colored (typically blue, green, or brown) area, with the pupil (the circular black spot) in its center, and surrounded by the white sclera.

well god made humans for male and female to merry each other, and he does not hate gays he condemns it, and that's also the example jehovah's witnesses follow, we don't get involved with arguments or hate gays but we just condemn it. to find more information, you can go to our website jw.org and find more answers to your question just by tapping of the top right search bar and asking your question and then it will show you all the free bible publications that fit with you question, this site is entirely free and there fo anyone's usage.   ( i do not own jw.org)

answer; training;