Biodiversity hotspots are the richest and most threatened reservoirs of life on Earth. Thus, the correct option is D.
Biodiversity hotspots may be defined as the regions of the earth which are rich in biodiversity and possesses the following criteria:
Therefore, Biodiversity hotspots are the richest and most threatened reservoirs of life on Earth. Thus, the correct option is D.
To learn more about Biodiversity hotspots, refer to the link:
https://brainly.com/question/17770550
#SPJ1