Why is this the answer?

The answer is milk because this riddle uses a super clever trick with the word "turn." When you first hear the riddle, you probably think of objects that spin around, like a top, a car wheel, or a dancer doing a twist. The riddle mentions, "You can spin, wheel and twist," to get you thinking about physical objects that rotate and move. These first clues are designed to trick your brain into expecting a moving object. The true key to solving this mystery is understanding the word "turn" in a completely different way. We often say milk has "turned" when it goes bad or spoils. If you leave a carton of fresh milk out of the cold refrigerator for too long, a few hours later it will start to look lumpy and taste very sour. When that happens, the milk has "turned," or become spoiled, and it is definitely not safe or good to drink anymore. This change happens all by itself, quietly, right inside the container, without the milk having to spin or move an inch. The way milk changes from fresh and smooth to sour and chunky is called "turning" sour. Scientists would explain that tiny living things, called bacteria, grow inside the milk over time, especially when it is warm. It is these tiny bacteria that cause the milk to change its chemical makeup, making it "turn." This process is an invisible change, but it results in a very clear difference you can see, smell, and taste. The riddle is playing a fun word game by comparing physical movement like spinning to a chemical change like spoiling. The milk does not move, but it still "turns." That is why milk is the perfect solution for this playful word puzzle. It is one of the few things that can change its state from good to bad, or "turn," without needing to physically rotate or travel anywhere. It just needs time and a little bit of warmth to complete its famous, unmoving "turn."