Final answer:
The correct term for the combination of the sense of smell and plant extract healing is aromatherapy. It is a form of alternative medicine using essential oils from plants.
Step-by-step explanation:
The term used to describe the combination of the sense of smell and the use of plant extracts for their healing abilities is aromatherapy. This practice falls under complementary or alternative medicine and involves the use of essential oils extracted from plants, which are believed to influence mood, cognition, and health. The correct option from the choices provided is c) aromatherapy. Trichology is the study of hair and scalp health, electrology involves the removal of hair using electrical devices, and massage therapy pertains to the manipulation of muscles and soft tissues.