Final answer:
Oceans could be compared to rainforests in terms of species variety, as they are both incredibly diverse and support a wide range of plant and animal life.
Step-by-step explanation:
In terms of species variety, oceans could be compared to rainforests. Like rainforests, oceans are incredibly diverse and support a wide range of plant and animal life. Coral reefs, for example, are unique marine ecosystems that are home to a wide variety of species.