Answer:
models are a type of auxiliary verb, also called a helping verb. They work alongside of other verbs to give your sentences a new meaning.
permission includes may, can, could which we use to ask permission
prohibition includes can't and mustn't usef to show that something is prohibited or not allowed
obligation includes have to and must both used to express obligation.
modals help me in communicating because it adds meaning to the main verb so we can express our thoughts fully and avoid misunderstandings when communicating
Respectful and responsible, because there are times that we might use the wrong modal and can appear disrespectful to someone else and responsible enough to acknowledge our mistakes