Concept:Genus is a taxonomic rank that groups species which are closely related and share many common features.Explanation:In biological classification, species form the basic unit. Species that have a high degree of similarity are placed together in the same genus. For example, the lion (Panthera leo) and the tiger (Panthera tigris) belong to the same genus Panthera because they share more characteristics with each other than with other cat species. A genus does not include families, individuals, or populations; it specifically represents a cluster of closely related species.Answer:D. a group of closely related species
