Riding in a hot air balloon is an exciting way to travel. Passengers climb into a basket that is attached to a huge balloon with cables. The balloon is filled with hot air. The burning gas and heat inside the huge balloon make it lighter than the surrounding air.
The balloon rises and lifts the passengers into the sky. The pilot does not know where the balloon will go. It floats gently in the
direction the wind blows. The passengers enjoy a fun ride with a terrific view of the land and water below them. When the pilot is
ready to land, he or she lets the air cool inside the balloon. The balloon starts to become heavier and begins going back down to
land. A group on the ground follows the balloon in a car and watches where it lands. Part of the excitement is that no one knows
exactly where a hot air balloon will land.
The main idea of this passage is
ОА.
hot air balloon passengers ride in baskets
OB.
hot air balloons are lifted by hot air
Oc.
groups of people follow balloons in cars.
OD. traveling in a hot air balloon is exciting