Final answer:
To use a spa pool and wet areas, a valid membership, proper swimwear, and towels are required.
Step-by-step explanation:
In order to use a spa pool and wet areas, all of the following are required: a valid membership, proper swimwear, and towels. To use a spa pool and wet areas, several requirements are generally in place for health and safety reasons. Firstly, a valid membership is often required, which ensures that only authorized individuals are using the facility. Secondly, proper swimwear must be worn. This is to maintain hygiene standards, as materials used in regular clothing can introduce contaminants into the pool. Thirdly, towels are typically required for personal hygiene and to maintain cleanliness around the pool area. Therefore, all of the provided options are correct: a valid membership, proper swimwear, and towels are all required to use the spa pool and wet areas.