The correct answer is: d) All of the above.
Prayer wheels are an important part of Tibetan Buddhism. They are cylindrical objects that are filled with prayers or mantras. When the wheel is turned, the prayers are said to be released into the universe.
Prayer wheels can be made of wood, metal, or stone. The most common type of prayer wheel is made of wood. It is typically about the size of a large coffee can and has a handle on one end. The outside of the wheel is covered with prayers or mantras that have been written on strips of paper or cloth. When the wheel is turned, the prayers are said to be released into the universe.
Metal prayer wheels are also common. They are typically made of brass or copper and are often decorated with intricate designs. Stone prayer wheels are less common, but they are also very beautiful. They are typically made of marble or granite and are often carved with religious symbols.
Prayer wheels are often placed in temples or other sacred places. They can also be found in homes and businesses. People turn prayer wheels as a way to show their devotion to their religion and to pray for good luck and blessings.