Many people have not heard giraffes make noises. Giraffes do not use sounds to “talk” with each other. When hurt, giraffes make a low moo, something like a cow. When frightened, they make a short, high sound.
What is the main idea?
Giraffes do make noises
Giraffes talk all the time.
Cows and giraffes talk to each other.
Lots of people have heard giraffes talk.