After reading a book, Julio looks out of the window and sees clouds in the distance. Which change allows Julio to clearly see the clouds after looking at his book?

When Julio switches from looking at a nearby book to distant clouds, his eyes accommodate by changing the shape of their lenses. The lens becomes flatter to focus light from distant objects clearly on the retina, so the correct choice is “His lenses change shape.”

AI-written and checked against the verified answer.