A pool is a small, still body of water. The dog in the picture is in a wading pool. Larger pools that are big enough to swim in are called swimming pools.
A rule is something that tells you how you are expected to behave. Rules can be written down, or just something you are expected to know. Some rules are enforced by punishments. A set of rules that affects everyone in a large area is called the law.
Sis forSwimming pool
A swimming pool is a place that people have made just for swimming in. They are usually made out of a hole dug in the ground, lined with concrete and tiled. Some swimming pools are above ground, or are inflatable so you have to pump them up with air before you fill them with water.
Swimming pools usually have very clear, pale blue water.
