What does the term "physiological effect" refer to in the context of aromatherapy?

The term "physiological effect" in the context of aromatherapy refers specifically to the impact that essential oils have on physical health and bodily functions. This can include various responses within the body such as changes in heart rate, blood pressure, digestion, and overall immune function, among others. Aromatherapy works through the inhalation or topical application of essential oils, which can lead to physical changes in the body due to the compounds in these oils interacting with bodily systems.

In this context, the other options, while relevant to the holistic experience of aromatherapy, do not specifically capture the essence of "physiological effect." Emotional impacts, social interactions, and cognitive changes can all be influenced by aromatherapy, but they pertain to psychological or social domains rather than the direct physical responses triggered by essential oils. Therefore, focusing on the effects that directly influence physical health aligns precisely with the definition of physiological effects in this practice.