Biodiversity hotspots are best described as regions with:

• A. Regions with the most rainfall only.
• B. Regions with the highest pH.
• C. Regions with high species richness and endemism.
• D. Regions with the most tourists.

Answer: (C)

Biodiversity hotspots are regions that contain a large variety of species, and many of those species are endemic—found only in that place. This combination means the area hosts a unique and concentrated pool of life, so losing habitat there would erase species that can’t be found anywhere else. The other options don’t capture this idea: rainfall amount, soil pH, or tourism levels don’t by themselves indicate a region’s unique and concentrated biodiversity. Emphasizing endemism together with high species richness explains why these areas are prioritized for conservation, since protecting them safeguards a large number of species, including many found nowhere else.