1 Nocturnal animals sleep during the day and are awake at night. 2 They have special characteristics that help them get around in the dark. 3 I have been afraid of the dark since I was four years old. 4 Most nocturnal animals have special eyes that reflect the light to help them see. 5 Some nocturnal animals, like bats, use echolocation. 6 Other nocturnal animals, like rabbits, have good hearing. Which sentence is unrelated to the paragraph? A) sentence 2 B) sentence 3 C) sentence 4 D) sentence 5