Reasonable suspicion is a legal standard used by law enforcement to justify stopping and questioning an individual. It is based on specific and articulable facts that suggest a person may be involved in criminal activity. This standard is lower than probable cause, which is required for obtaining a search warrant or making an arrest. Officers must rely on their training, experience, and observations to establish reasonable suspicion. Factors such as a person's behavior, location, or time of day can contribute to this suspicion. However, mere hunches or unparticular feelings are not sufficient to meet this legal threshold.