Please choose the correct ending to complete the given sentence: River tubing: A river surrounded by rocks apperas. several people

Ending1: are floating through it in intertubes. Ending2: wade through the water looking at rocks. Ending3: are shown riding down the rough river, occasionally falling off the boat to hit rocks. Ending4: are seated on rocks, drinking from the water while kayaking.

Answer format: ending1/ending2/ending3/ending4