Please choose the correct ending to complete the given sentence: River tubing: Several kids are in their inner-tubes in the water among other people floating on inner-tubes in the water. several people

Ending1: are on inflated boats which the tug of war is being pulled by a tug rope. Ending2: float at the bottom of a deep pool surrounding by rocks and water. Ending3: are shown in canoes with people in inner-tubes in the background. Ending4: are in a large blue area together.

Answer format: ending1/ending2/ending3/ending4