Concept:A tractor is a versatile farm power source that can operate various implements.Explanation:Diagram III shows a tractor.Tractors transmit power through the power take-off (PTO) and hydraulic systems.This power can operate planters for sowing.It can also power dryers for crop processing.It can power sprayers for applying chemicals.Hence, the tractor can drive all three listed machinery types.Answer:D. I, II and III
