An individual with a health issue visits a traditional healer and reports an improved condition even though the visit did not include any explicit treatment. What term best applies to this scenario?

The term which applies to this type of scenario is Placebo effect.

Explanation:

In Placebo effect an individual reports an improved health condition without undergoing an actual treatment. Mind plays a pivotal role in placebo effect and deeply influences our body too. Our mind has the ability to trick our body into believing that a fake treatment can heal our heal.

Placebos, which are pills having no therapeutic benefit, can powerfully influence our body to mimic the action of a real medical treatment.

i think the answer would be b.