Final answer:
A deep tissue massage received by Gina at the spa is categorized as Relaxation Therapy, focusing on alleviating muscle tension and promoting stress relief.
Step-by-step explanation:
Gina's deep tissue massage at the spa would be categorized as B) Relaxation therapy. Deep tissue massage is a technique that focuses on the deeper layers of muscle and connective tissue. It is often used to release chronic muscle tension, reduce stress, and improve relaxation. While it can be therapeutic, it is not the same as physical therapy, which is a healthcare service provided to help individuals recover, restore, and maintain their physical abilities. Aromatherapy involves the use of essential oils for therapeutic benefit, and holistic therapy refers to treatments that aim to treat the person as a whole, rather than focusing on a specific ailment or body part.