How does hot air balloon rises and lands?

A hot air balloon rises when the air inside the envelope is heated, causing it to become less dense than the cooler air outside, which creates lift. The pilot controls the altitude by adjusting the temperature of the air inside the balloon using a burner; heating the air causes it to rise, while allowing it to cool makes it descend. For landing, the pilot gradually cools the air or releases some to control the descent speed, ensuring a safe landing. The process requires careful management of temperature and altitude throughout the flight.