The correct option is D Species
The major categories in taxonomy (in descending order) are Kingdom, Division or Phylum, Class, Order, Family, Genus, Species. Species is thus, the smallest group, while Kingdom is the largest. Thus, considering the characteristics in each of these taxa, the most general characters would apparently be found at the Kingdom level, while the most specific (or less general) characteristics would be seen at the species level. For example, characteristics of Kingdom Animalia would be very general, while the characteristics of a species under it, Homo sapiens, would be much more specific.