Answer:
4.The use of solar energy is especially limited in areas that do not get regular sunlight.
Step-by-step explanation:
The best counterclaim to the author's position is numeral 4)
While it is true that solar energy has the potential to be more widely used, and that the production of electricity throught sun's energy is becoming more cheaper, it is also true that some geographical regions do not get regular sunlight during many periods of the year, and in this area, relying on solar energy is not very practical.