Final answer:
The boundaries of a swimming pool refer to the physical limits or edges of the pool, as well as the maintenance of the water's composition and substances.
Step-by-step explanation:
The boundaries of a swimming pool refer to the physical limits or edges of the pool. These boundaries can be defined by walls, fences, or other structures that surround the pool. In the context of maintaining the health and comfort of people in the pool, the boundaries also include the careful maintenance of the pool water's composition and relative amounts of substances, such as chlorine and pH levels.