Respuesta :
Since the sun is the main source of evaporation on earth's surface, then the answer should be Solar since solar refers to the sun. It's usually not visible though because it mostly occurs over oceans where it is not seen from the shores.
Answer: solar
Explanation: Evaporation is the phenomenon in which liquid vaporizes to gaseous form before its boiling point.
Thus energy is required for evaporation of liquids on earth's surface, which is mostly provided by sunlight.
Wind energy is used to drive the turbines to generate electrical energy.
Gravity acts on bodies which pulls them down towards earth's surface.
Electrical energy is due to movement of free electrons.