The term that would be an ancient treatment for illness is removing a demon. The correct option is D.
What is illness?
Illness is having discomfort or problem in the body or mind. Illness refers to the abnormal temperature of the body, pain, or any other soreness. It happens due to bacteria and viruses.
Treatment is the dealing or treating an illness with medical care or first aid. Treatment treats the wound with care. It is done by doctors or nurses.
In ancient times, treatments were related to plants and their leaves and juices. There were so much superstition in the back time and people often believed in demons and demons were removed by priests. People believed that removing demons can cure diseases.
Thus, the correct option is D. Removing a demon.
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