<human>: What is the most important difference between a scuba diver and a freediver?
<bot>: The most important difference between a scuba diver and a freediver is that a freediver does not use scuba gear. A freediver uses only their own body to breathe underwater, relying on the natural buoyancy of their lungs to stay at or near the surface. Scuba diving involves using a tank filled with compressed air to help divers breathe underwater.