Correct option is C)
[A] Pucca houses are strong houses. They are made up of wood, bricks, cement with the iron rods and steel. Flats and bungalows are a type of pucca houses.
[B] Tents are used for holiday camping. Modern-day tents are made of waterproof materials, like canvas cloth or nylon.
[C] House on wheels is termed as Caravans. It may be pulled by an animal or by car or truck. People move from one place to another and live in caravans.
[D] Some region such as the Arctic region and Polar Region is completely covered with snow and are extremely cold. People in that region built house by using a block of snow generally in the form dome shape. Dome shape will help to keep the place warm from inside.
So the correct answer is House on wheels are called caravans. Thus the correct option is C.