A reason is an explanation or justification for why something happens or why a decision is made. It helps people understand the cause behind actions or events. For example, if someone decides to wear a jacket, the reason might be that the weather is cold. In everyday life, reasons guide our choices and behaviors. They can be based on personal beliefs, experiences, or factual information. For instance, a student might choose to study hard for an exam because the reason is to achieve good grades and secure a scholarship for college.