Competition among organisms primarily influences biodiversity by promoting the principle of "survival of the fittest." This means that it can increase biodiversity by leading to adaptive radiation, where species evolve to exploit different niches. However, it can also lead to the extinction of weaker species, which would decrease biodiversity. Thus, the most accurate response is:
It increases biodiversity by promoting the survival of the fittest.
This option reflects how competition drives natural selection, which can ultimately lead to a diverse range of species adapted to various roles within an ecosystem.
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