Which would have the highest biodiversity?

Ecosystems like tropical rainforests generally have the highest biodiversity due to their complex structure, stable climate, and abundant resources. These environments support a vast array of plant and animal species, many of which are not found elsewhere. Coral reefs are another example, hosting thousands of species in a relatively small area. In contrast, habitats like deserts or polar regions typically exhibit lower biodiversity due to harsher conditions and limited resources.