Final answer:
Three quarter coverage helmets are known as 'open face' helmets, covering most of the head except the face, offering visibility and comfort.
Step-by-step explanation:
Three quarter coverage helmets are also called “open face” helmets. This type of helmet covers the top, back, and sides of the head but leaves the face exposed, which provides a greater field of view and more airflow but may offer less protection than full-face helmets. They are a popular choice among motorcyclists, especially those who prefer more visibility and comfort, although they might choose to wear goggles or have a Snap-On visor for eye protection.