Curve A represents how soil takes longer to heat and longer to cool. Curve B represents how water takes longer to heat and longer to cool.
In the graph, the x-axis represents time, and the y-axis represents temperature. Curve A shows that the temperature of the soil rises slowly at the beginning and takes a longer time to reach its peak temperature. After that, the temperature gradually decreases, indicating that the soil cools slowly.
On the other hand, Curve B shows that the temperature of the water rises quickly at the beginning and takes a shorter time to reach its peak temperature. Then, the temperature decreases gradually, suggesting that water cools slowly.
Therefore, Curve A represents how soil takes longer to heat and longer to cool, while Curve B represents how water takes longer to heat and longer to cool.