The sheikh cleans a wheel of dust

The correct answer would be it. dry grass.

The sheikh cleans his closet of dust with a large comb, plenty of water, dry grass, and dry straw. This is done to ensure that the wheel is free of any dirt or dust that may accumulate during the day or over time. Grass is used to help remove dirt and dust, while straw helps in drying and removing moisture. After this is done, the wheel is polished with a clean cloth to give it a wonderful shine. Using this method, the wheel stays clean and shiny, which helps it last longer and look better.