Please respond to the following:
Assault is classified as either simple or aggravated (felonious assault). Simple assault is intentionally causing another person to fear immediate bodily harm or death, or intentionally inflicting or attempting to inflict bodily harm on the person. Aggravated or felonious assault is an unlawful attack by one person on another to inflict severe bodily injury. However, there are times when physical force may be used legally, in certain instances, without it constituting an assault. In specified instances, teachers, people operating public conveyances, and law enforcement officers can legally use reasonable physical force.