The species of plants and animals which are found exclusively in a particular area are

The correct option is A Endemic species
Endemic species are restricted to a given area for various reasons like some special requirements for optimum growth, soil and other environmental conditions etc. Biodiversity hotspots are the regions with very high levels of species richness and a high degree of endemism. The orange-breasted sunbird (Nectarinia violacea) is exclusively found in fynbos vegetation.