If 'TRAIN' is called 'BUS', 'BUS' is called 'TRACTOR', 'TRACTOR' is called 'CAR' , 'CAR' is called 'SCOOTER' , 'SCOOTER' is called 'BICYCLE' , 'BICYCLE' is called 'MOPED', Which one is used to plough the field?
Selecciona una de las siguientes respuestas posibles: