Identify the organizing principle of the following passage. Dolphins, like birds and animals, use vocalization to communicate. T
hey produce creaks, whistles, screams, chuffs, pops, squawks, and chirps. With these sounds, dolphins communicate anger, frustration, affection, and contentment with each other. Dolphins use visual signals to convey information. A vigorous bobbing of the head, a wide-open gaping mouth, bubble bursts, bubble clouds, an S-shaped swimming position, and flared-out pectoral fins convey frustration, threat or anger.