Answer:
Evaporation is a process by which an a element or compound (water) changes from liquid state to a gaseous state at a temperature below its boiling point.
This process happens when the element/compound (water) gained enough energy (sunlight/heat) to enter the gaseous state.
The statement "After a day of sunshine, the puddle is gone.", means that the temperature of heat coming from the sun, have enough energy for the puddle of water to disappear.
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