According to Eugene Morton, a scientist, all animal sounds have certain things in
common. Animals tend to make low, loud sounds when they are angry and to make
high, softer sounds when they are fearful or friendly. Human beings can, of conrse,
make many more kinds of sounds than most animals, but Morton believes that even
human speech has the same features as other animal sounds. According to his theory,
if you say, “I love you," your voice will be