<span>It would be "correlating" rocks of similar age in different regions.</span>
Answer:
Around 1890, in Vienna
Explanation:
Sigmund Freud was the creator of Psychoanalysis. In 1886 he was using hypnosis to treat patients with psychopathologies. A decade later he already had proposed Psychoanalysis as a way to treat psycho disorders, and revolutionized the Medicine filed.
