What part of the eye gives it color?

More Questions:

Who was America's first billionaire?

This drink is made from espresso coffee, hot milk and chocolate?

What is Donald Duck’s car?

What is a fruit machine?

What is the top color on the neck of the guitar in the Guitar Hero game?

What was the capital city of West Germany from 1949 to 1990?

What are the grinding teeth called?

In the TV show "The Simpsons', why did Bart and Homer have to work at the carnival?

How old is Sarah in the movie "Terminator 2"?

What was the name of the hotel in the 1960 movie "Psycho"?

What late actor played The Monster in 1974 movie "Young Frankenstein"?

Iron Man's suit is powered by a reactor located where?

Who was Henry VIII's first wife?

Which country, that ceased to be a US territory in 1946, celebrates July 4 as its "Republic Day"?

In "Ready Player One" by Ernest Cline, who must the player defeat in order to obtain the copper key?