There is more Biodiversity in the costal plains ecoregion than in the mountains basin ecoregion due to: A. More annual precipitation B. Higher elevation C. Less annual precipitation D. Colder temperatures
Seeing as it is by the coast, the abundance of biodiversity will likely be due to more precipitation. It’s unlikely that colder term-erasures would lead to biodiversity, nor would less annual precipitation- life generally thrives on warmth and water
