Final answer:
The correct answer to the question is option a: 'absorbing; is.' The ground absorbs sunlight, which warms the Earth's surface, and this process is enhanced by the greenhouse effect, which traps heat within the Earth's atmosphere.
Step-by-step explanation:
The question presented is related to the transfer of heat from the Sun to the Earth, particularly focusing on the ground's response to this energy. The best option to fill in the blanks would be option a, 'absorbing; is,' resulting in the sentence: 'The ground seems more like heat from Sun wind absorbing; is.' This is because the earth's surface (soil, water, and vegetation), especially those with darker colors, tend to absorb the sunlight and convert it into heat.
Furthermore, absorbing sunlight — which includes visible and infrared radiation — warms the Earth's land, water, and atmosphere. As explained in Figure 14.28 of the given reference, the greenhouse effect is a process where the Earth's atmosphere traps this heat, analogous to the glass of a greenhouse, effectively warming the planet more than if it simply reflected the incoming radiation. It's important to note that clouds can also affect heat transfer by reflecting radiation back to the surface, decreasing the amount of heat lost to space.