Please choose the correct ending to complete the given sentence: Kite flying: Two girls are standing outside a building. They are holding strings going into the air. they

Ending1: start to play together, taking turns jumping across the strings. Ending2: are playing a series of violin and harp. Ending3: are playing a game of tug of war. Ending4: are flying kites in the sky.

Answer format: ending1/ending2/ending3/ending4