Rationale refers to the underlying reasoning or justification for a decision, action, or belief. It explains why something is done or why a particular viewpoint is held. Understanding the rationale helps clarify the thought process behind choices and can guide future actions. In various fields, such as education, business, and science, a clear rationale is essential for effective communication and decision-making. It allows individuals and groups to evaluate the validity of ideas and to make informed choices based on logical reasoning and evidence.