Please choose the correct ending to complete the given sentence: Waterskiing: After picking up speed on the powered boat, their friends jump off and have a great time. a line of rope

Ending1: is thrown behind them on the shore of the boat. Ending2: is thrown out for them to grab onto and it begins. Ending3: is strung between two trees and they are joined together by two people. Ending4: is strung between two trees leading into a waterfall.

Answer format: ending1/ending2/ending3/ending4