Second Law Of Thermodynamics

Imagine trying to push a heavy boulder uphill without any help. Just like how it's unnatural for a boulder to spontaneously roll uphill, it's against the natural order for heat to move from a cooler object to a warmer one. In both cases, there's a preferred direction: the boulder wants to roll downhill just as heat naturally flows from a hot body to a cooler one, aligning with the Second Law of Thermodynamics which states that without external work, heat will not transfer from a lower temperature body to a higher temperature body.