Please choose the correct ending to complete the given sentence: Building sandcastles: A boy is sitting on the sand of a beach. A colorful towel is next to many small sand castles. the boy

Ending1: continues to play in the sand. Ending2: picks up each side of the towel, then lays it back on the sand. Ending3: then places the towel over one of the castles and begin painting it. Ending4: then poses after receiving a dog from the owner.

Answer format: ending1/ending2/ending3/ending4