Answer :
Final answer:
Ernest Kretschmer introduced the concept of body physique and categorized body types into three main categories: endomorphs, mesomorphs, and ectomorphs.
Explanation:
The correct answer is OA. Ernest Kretschmer.
Ernest Kretschmer was a German psychiatrist who introduced the concept of body physique. He believed that different body types were associated with specific personality traits and predispositions to certain diseases.
For example, he categorized body types into three main categories: endomorphs (round and soft), mesomorphs (muscular and athletic), and ectomorphs (lean and tall).
Kretschmer's theories on body physique were influential in the field of psychology and contributed to the understanding of the relationship between physical characteristics and psychological traits.
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