Placebos are sometimes used in research in order to demonstrate the effects of participant expectations or beliefs on the outcome of behavior.
(a) true
(b) false

True.

Explanation: Placebo is an intervention designed to simulate a medical therapy, which has no specific effects for the condition being applied. The placebo effect is the modification, often physiologically demonstrable, that occurs in the body as a result of the psychological stimulus induced by the administration of an inert substance, a drug or a treatment.

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

i hope this

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