Why does flour keep ice melting slower?

Flour can slow down the melting of ice because it acts as an insulating layer. When flour is spread over ice, it creates a barrier that reduces the direct contact between the ice and warmer air, thereby lowering the rate of heat transfer. Additionally, the flour can absorb some moisture, forming a paste that further slows the melting process. This combination of insulation and moisture absorption helps maintain the ice's solid state for a longer period.