Final answer:
It is true that you only need to fence three sides if one side of the pool is adjacent to the house.
Step-by-step explanation:
The question asks whether it is true or false that you only need to fence three sides if one side of the pool is adjacent to the house. The answer is True. Since one side of the pool is already against the house, you only need to add a fence to the other three sides to fully enclose the pool area.