Dogs throw the floor because it’s in their nature. Dogs will often throw the floor or other objects to get your attention, either because they are excited or want to play. Sometimes dogs throw the floor because they have a natural tendency called "seeking behavior," which is when they are looking for food or toys. Sometimes dogs throw the floor because they are bored or agitated, which may be because they are not getting enough physical exertion or mental stimulation. If your dog frequently throws the floor, you may consider providing them with more physical exertion and mental stimulation, such as taking them out for a walk, playing, or giving them some new toys. You can also train them not to throw on the floor, using basic training methods to teach them the "put down" or "don't take" commands.
Overall, it is important to remember that it is natural for dogs to throw the floor, so you should treat it patiently them and give them enough attention and care.