The formal style is a communicative style that can be used when what is been communicated is something that the speaker needs to prepare in advance. For example, an important announcement speech by the manager of a company.
The frozen style involves a speech that requires little feedback from the audience. For example, the speeches made during a marriage ceremony follows the frozen style.
The consultative style is best evident in a classroom situation as it allows for short sentences.
The casual style is a conversational style between individuals who do not have a close relationship but a casual one. For example, our conversation with a person via phone call.
The intimate style occurs in a situation where married couples discuss issues as a family or communication between best friends.
