There are many ecological niches that can be filled by more than one species. There are various ecological niches that must be filled if there is to be life on Earth. Biodiversity does not require that all existing species continue to exist. The survival of life on Earth depends upon biodiversity.
While biodiversity is indispensable to the survival of life on Earth, biodiversity does not require the survival of every currently existing species. For there to be life on Earth, various ecological niches must be filled; many niches, however, can be filled by more than one species.
Which one of the following statements most accurately expresses the conclusion drawn in the argument?