What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else, including many species in high risk of extinction? These areas receive the focus of global conservation efforts.

Biodiversity hotspot

Explanation:

The biodiversity hotspots are the biogeographic regions that have lost about 70% of the habitat or primary vegetation and the region is rich with 1500 species of plants not found anywhere in the world except that area. These species are called endemic species.

The biodiversity hotspots are the regions that require the attention of the Conservation ministry as these areas are continuously threatened due to loss of population, pollution, destruction of the area and many other factors that have destroyed the forest area.

Thus, Biodiversity hotspot is correct.

it creates acid rain