Please choose the correct ending to complete the given sentence: Tumbling: Three girls are on the beach talking. They do several flips on the beach. they

Ending1: flip on and off the board. Ending2: toss a ball back and forth over the water. Ending3: hit the ball back and forth. Ending4: lift one of the girls up for a stunt.

Answer format: ending1/ending2/ending3/ending4