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Hey there, I built this website for students studying for tough tests. I think everyone should get education for free, so that's why I made this site. But now, the way Google ranks websites changed, and not many people are visiting here. I use money from Google ads to keep this site running, but with less visitors, it's hard to do that anymore. If you like this website and want it to keep going, can you help out? Any support you give would be really appreciated. Thanks a lot for considering it.


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Which one of the following statements is correct about biodiversity ?

A. It is the occurrence of varied type of organisms on earth.

B. Each different kind of plant, animal or organism represents a species.

C. The number of species that are known and described range between 1.71.8 million.

D. All of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".