A peridic maintenance activity carried out on through farm tractor is

Periodic maintenance activity carried out on a farm tractor refers to a regular servicing procedure to keep the tractor in good working condition. Among the options given, all are important maintenance activities, but the best answer to the question is "changing of engine oil." This is because the engine oil keeps the engine lubricated and helps it to run smoothly. Over time, engine oil can become dirty and less effective at lubricating the engine parts. Therefore, changing the engine oil regularly is important to keep the engine in good working condition. Other maintenance activities mentioned such as checking the radiator water, tire pressure, and cleaning after use are also important to ensure the tractor is safe and reliable for use on the farm.