The fire makes the air density decrease. If you are 6 km high, you would have trouble breathing. The fire in the hot air balloon would start to die down that high, the fire keeps the air less dense which makes the big cloth stay like a big balloon. If you were that high, the fire would die down and you’ll fall to the ground at very high speeds.
Answer:
sorry i seen your need help fast and was going to help but that was from yestrday so i dont think you need help anymore.
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I dont undrstand the question