Answer the following question: Fact 1: Light enters the eye through an opening called the pupil. Fact 2: Eyes used for seeing ahead and balance. Given the two facts above, what is light used for?

Choices:
(a). Electrical energy;
(b). Animal survival;
(c). noise;
(d). to move people;
(e). Seeing ahead;
(f). hearing;
(g). Chemical energy;
(h). listening;
Answer:
(e).