What are the contextual features of a register modefield and tenor?

In linguistics, register refers to the variation in language use depending on context, purpose, and audience. The mode of communication can be spoken or written and influences how information is conveyed, such as through formal or informal styles. The field pertains to the subject matter and activities involved, while tenor relates to the participants in the communication, including their roles, relationships, and social dynamics. Together, these features shape the overall tone and appropriateness of language in different situations.