Which one of following is not observed in biodiversity hotspots? 

$\text{Correct option: }$ A

$\text{ Solution: }$

$\text{ Option (A): }$

$?$The  biogeographic region showing the presence of a significant level of biodiversity  that is threatened by human habitation and destructive activities, is defined as a biodiversity hotspot. 

$?$This area shows the less interspecific interaction or particularly competition of the species. 

$\text{ Option (B): }$

$?$Species richness (S) is considered as the number of species within a defined region. 

$?$This factor is considerate in the ecological area, specifically a biodiversity hotspot. 

$\text{ Option (C): }$

$?$Endemism is the state of a species which is a native of a particular geographic location. 

$?$These species are not found anywhere else or any other geographic area. 

$\text{ Option (D): }$

$?$The destructive human activity such as increasing pollution, overexploitation,habitat loss, and the introduction of invasive species brings in the global extinction or the biodiversity loss. 

$?$This biodiversity loss is actually correlated with accelerated loss of species. 

Hence, the correct option is (A).