Answer: The hot weather cases the cold pool water to evaporate.
Hope this helps! I didn't have much to work with sense you didnt give options :)
Molecules are moving because they have energy. As the liquid cools down, the amount of energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice. Even in this solid stage, the molecules are still moving – we just can’t see it.
