A question is an expression, typically interrogative, used to elicit information or a response. It is a fundamental tool for communication, learning, and problem-solving. Questions can seek factual information, explore opinions, request clarification, or initiate a discussion.

Here are some key aspects of a question:

• Purpose: To obtain information or a response.
• Structure: Often, but not always, includes interrogative words like "who," "what," "where," "when," "why," and "how."
• Function: To prompt thought, investigation, or action.

Different types of questions exist, including:

• Open-ended questions: Allow for detailed and expansive answers.
• Closed-ended questions: Typically require a simple "yes" or "no" answer.
• Rhetorical questions: Asked for effect rather than to elicit a direct answer.

For more information, you can refer to these resources:

• Wikipedia: Question