The term refers to the total number of different species, including humans, on Earth or in an area, is the biosphere. The correct option is D.
A biosphere is a place where all plants, animals, and other living factors live. It is the place where all the conditions are present to survive and live. It contains proper temperature, oxygen, and pressure. Likewise, it is the only sphere where life is possible.
Species are organisms that can reproduce with each other. They have the same characteristics and may have differences between males and females.
There are seven spheres present, in which living things can survive in the biosphere only. The area where the roots go and the upper area, where the flying objects can go, comes under the biosphere.
Thus, the correct option is D, the biosphere.
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