Airspace refers to the portion of the atmosphere that is controlled by a country for the purpose of managing air traffic. It is divided into different classes, each with specific rules and regulations to ensure the safety of aircraft. For example, commercial flights often operate in controlled airspace, where air traffic controllers guide pilots to prevent collisions. Different types of airspace include Class A, Class B, Class C, and so on, each serving various purposes. General aviation flights, such as small private planes, may operate in less regulated airspace, allowing for more flexibility. Understanding airspace is crucial for pilots, air traffic controllers, and anyone involved in aviation.