Final answer:
The subject of this question is Business, and it involves the success and operations of a spa and salon.
Step-by-step explanation:
The subject of the question is Business. The passage provided reveals information about the owner of a spa and salon, SpiritAway Spa, and how her business has seen a 20% increase in sales compared to the previous year. It also mentions the number of hair stylists and aestheticians employed by the business. This information falls under the topic of business operations and success.