Here's why:
* Air Pressure: Air pressure is caused by the collisions of air molecules with a surface. More collisions mean higher pressure.
* Water Vapor: When water evaporates, water molecules become part of the air.
* Displacement: As more water molecules enter the air, they take up space that was previously occupied by air molecules. This means there are fewer air molecules colliding with surfaces, resulting in lower air pressure.
Think of it like a crowded room. If more people enter, the room becomes more crowded, but the number of people bumping into each other decreases because they have less space to move.
