Niche is

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all the biological factors in the organism's environment

the physical space where an organism lives

the range of temperature that the organism needs to live

the functional role played by the organism where it lives

answer is D.

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Detailed Solution

Niche is the functional role played by the organism where it lives. Each organism has an invariably defined range of conditions that it can tolerate, diversity in the resources it utilises and a distinct functional role in the ecological system, all these together comprise its niche. Eugene P. Odum describes that “The ecological niche of an organism depends not only on where it lives but also on what it does. By analogy, it may be said that the habitat is the organism’s “address”, and the niche is its “profession” .

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