What is the purpose of a diary?

A diary serves as a personal writing space where individuals can keep a daily record of their thoughts, feelings, events, and experiences. This practice allows the writer to reflect on their life, document memories, and express their emotions in a private setting. Diaries often capture personal insights and are not meant for public consumption, making them a unique means of self-expression. The primary purpose of maintaining a diary revolves around personal reflection and documentation over time, which is why this choice is the most fitting.