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B
Watt
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C
Elton
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D
Cannon
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Solution
The correct option is D Cannon
A. Whittaker was a distinguished American plant ecologist. He was the first one to propose the five kingdom classification - animalia, plantae, fungi, Protista and monera in 1969.
B. Watt was a Scottish inventor named the term watt.
C. Elton was an English zoologist and animal ecologist.
D. Cannon was an American physiologist, professor and Chairman of the department of Physiology at Harvard Medical School. He coined the term homeostasis and used to describe he body's ability to maintain a relative constancy in its internal environment.