Which of the following is a physiological benefit of aromatherapy?

Improving skin tone is indeed a physiological benefit of aromatherapy. Certain essential oils, such as lavender, tea tree, and rose, contain properties that can have a positive impact on the skin. They can help in promoting cell regeneration, reducing inflammation, and supporting overall skin health. For example, tea tree oil is well-known for its antibacterial and anti-inflammatory properties, making it beneficial for acne-prone skin. Similarly, rose oil can enhance skin hydration and soothe irritation, contributing to a more balanced and radiant complexion.

The other benefits listed, while important, primarily pertain to psychological or emotional aspects rather than direct physiological changes. For instance, relieving emotional stress and enhancing memory relate to mental and emotional well-being, while boosting spiritual awareness connects more to holistic practices rather than physiological effects on the body. Thus, the focus on skin improvement solidifies option B as the correct choice regarding physiological benefits.