Please choose the correct ending to complete the given sentence: Shoveling snow: A snow plow plows snow along a road at night. a man

Ending1: shovels snow on front a house with a plow. Ending2: walks up to a bot before turning it off. Ending3: drives a vehicle with an emergency field generator. Ending4: shovels snow to form a path from his door.

Answer format: ending1/ending2/ending3/ending4