Pick your answer from:
i. photons.
ii. fingers.
iii. cactuses.
iv. ears.
v. pupils.
vi. Decibels.
vii. noses.
viii. bullfrogs.
Given those answer options, answer the question: Fact 1: Eyes are used for seeing by animals by sensing light. Fact 2: Light enters the eye through the pupil. Given the two facts above, what are used for seeing by animals by sensing light?
A:
v.