What percentage of earth's land area is covered by the 25 hotspots?
A) 1.4%
B) 3.4%
C) 3.6%
D) 2.3%

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Hint: To be delegated a biodiversity hotspot, a district probably lost in any event 70% of its unique common vegetation, normally because of human movement. There are more than 30 perceived biodiversity hotspots on the planet.

Complete answer:
British biologist Norman Myers coined the term "biodiversity hotspot" in 1988, which is a biogeographic area characterized by abnormal plant peculiarities and severe habitat loss.

Biodiversity hotspot is a biogeographic area with a large amount of biodiversity, threatened by humans. Globally, there are 25 regions that meet the definition of hot spots. These sites provide support for nearly 60% of the world's plants, birds, mammals, reptiles and amphibians, among which a high proportion of endemic species.

There are particularly many endemic species in biodiversity hotspots, but the total area of ​​remaining habitats only accounts for 2.3% of the earth’s land surface. Every hotspot faces extreme threats and has lost at least 70% of its original natural vegetation. More than 50% of the world’s plant species and 42% of all terrestrial vertebrate species are unique to 34 biodiversity hotspots. Therefore, the correct answer is "2.3%"

Hence the correct answer is option ‘D’.

Note: The biodiversity significance of hotspots is because of the high weakness of environments and high essentialness of species found inside enormous geographic districts. Moreover, hotspots are home to 2.08 billion individuals 8 which adds essentialness to the biological system benefits that they give.