Which of the following is a commonly used complementary therapy in holistic nursing?

Aromatherapy is a commonly used complementary therapy in holistic nursing because it integrates physical, emotional, and spiritual healing through the use of essential oils derived from plants. This practice is grounded in the idea that scents can influence mood and overall well-being, promoting relaxation and emotional balance. The use of essential oils can help alleviate anxiety, enhance sleep quality, and support the immune system, making it a valuable tool in holistic approaches to health care.

In contrast, the other options, while essential in various medical and therapeutic practices, are primarily associated with conventional medicine. Chemotherapy, surgery, and radiation therapy are all invasive medical treatments aimed at managing diseases, particularly cancer, and although they are crucial for certain medical conditions, they do not fit the profile of complementary therapies typically endorsed in holistic nursing. Holistic nursing emphasizes the integration of complementary therapies with traditional medical treatments, and aromatherapy directly aligns with this philosophy by addressing a range of physical and emotional health concerns in a non-invasive manner.