It Is D
The classification is important for the complete study of the organism. The taxonomic level of classification was explained by the Linnaeus to characterize the organism.
The kingdom is the highest level of classification that includes almost most of the organisms. The species is the lowest level includes the taxonomy classification. Species includes the fewest and the unique organism that increases the uniqueness among the organisms.
Thus, the answer is species.
The correct answer is option D, Species
Species is the lowest level of classification is the taxonomy. At the highest position lies the Kingdom which consists of several “Phylums”, the “Phylum” consists of several “Class”. A “Class” consists of several “Order and family” and within a “Family” comes several “Genus and species”. For example – lets take the taxonomic classification of Human beings
Species: Homo sapiens
Species is basic unit of biological classification which contains the fewest number of organisms and this makes it most specific.
Species which have the same ancestors are placed in one rank called genus.
Taxonomic ranks in order (from the biggest to the smallest) :)