You are presented with the quiz "Where are images retained?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when light enters the eye through the pupil , that light falls on the retina" and "images are retained on the retina of a viewer's eye for a fraction of a second after they strike it". 

So, what's the best answer to the question?


 

 Retina          