Answer:
The correct answer is - an empirical approach.
Explanation:
An empirical approach is an evidence-based method that draws on observation and experimentation. In this approach, one interprets and study the information on the basis of experiment and evidence. It includes received through experience and attained through the five senses.
James Randi a magician issued the challenge that if one stands behind a wall barely taller than person, to find the location from the aura visible above my head shows the empirical approach of the challenge.