The given graph represents how three different living organisms (X, Y, and Z) cope with external environmental conditions. Study the graph and select the correct option regarding X, Y, and Z.
A
X could be a mammal.
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B
Y could be a bird.
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C
Z could be a mammal.
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D
X could be a bird.
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Solution
The correct option is A Y could be a bird.
In birds and mammals, the temperature of the body does not vary with the temperature of the external environment. It remains constant. So. 'Y' could be a bird or mammal.