Answer : Option D) At point 4, thermal energy from warm air over the land is transferred upward toward cooler areas of the atmosphere.
Explanation :
According to the attached diagram it seems that a water cycle is depicted using warmer and colder temperature changes.
Wherein, the warm air rises from the surface of the sea due to evaporation and heat produced from the sun. Once the warmer air reaches to a comparatively cooler region it sinks down and goes back to the sea. This cycle continues in the nature. Due to the thermal energy produced by the sun the warm air rises upward from the sea and reaches the cooler areas of the temperature.