Answer:
Each species occupies a different niche.
Step-by-step explanation:
A niche is a role for a species within the ecosystem. These roles evolve due to differing selective pressures on species. The ability for a great diversity of species is due to the differences highlighted by genetic diversity and natural selection (selective pressures) with species in an ecosystem. Without these differing niches, competitive exclusion or reduced carrying capacity for all species would likely occur.