Why do foods containing high amount of sugar not require refrigeration to prevent spoilage?

Foods high in sugar do not require refrigeration to prevent spoilage because sugar acts as a natural preservative. It reduces the water activity in food, making it difficult for bacteria, yeast, and molds to grow. Additionally, the high osmotic pressure created by sugar draws moisture out of microbial cells, further inhibiting their growth. Therefore, sugary foods can remain stable at room temperature without spoiling.