Which means of transport is extremely useful in most inaccessible areas and in time of calamities for rescuing people and distributing food, water, clothes and medicines?

Airways (air transport) is extremely useful in inaccessible areas and during calamities because aircraft and helicopters can reach remote locations quickly without requiring roads, rail tracks, or waterways. During floods, earthquakes, and other disasters when ground infrastructure is damaged, air transport is often the only means of delivering relief supplies and rescuing stranded people.