The correct order of taxonomic categories from the most specific to the broadest is:
Species, Genus, Family, Order, Class, Phylum, Kingdom
This means that the species is the most specific category, referring to individual organisms that can breed and produce fertile offspring. The genus groups together species that are closely related. As we move up the hierarchy, families contain multiple genera (plural of genus), orders contain families, and so on until we reach the kingdom, which is a broad classification that includes many different organisms.
Therefore, option A: Species, Genus, Family, Order, Class, Phylum, Kingdom is the correct sequence.