The accepted ways of doing things among a group of people

Customs, is the right answer.

Explanation:

The term custom is used to define a cultural idea that represents a formal, patterned style of functioning that is considered symbolic of life in social practice. In simple terms, the accepted ways of doing things among a group of people are known as the Customs. It is something that common personalities do, and have done for a long period. Generally, people appear from the corresponding nation, religion or culture.

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