Answer: b. etiquette
The rules and conventions governing correct or polite behavior and communication are called etiquette.
Explanation:
Etiquette is known to be the rules and procedures which guide the way and manner in which people or individuals behave in a social setting, class or group. Hence, it makes individuals to behave in such a way that they take others into consideration in gatherings. Examples include: observing table manner, guest at a party, relating well with colleagues and so on.