Why is there more variety in a king dom than species?

A kingdom encompasses a broader classification of living organisms, containing multiple phyla, classes, orders, families, genera, and species. It represents a much larger and diverse group of organisms compared to a single species. The higher taxonomic ranks such as kingdoms exhibit greater variety due to the accumulation of evolutionary differences over extensive periods of time. Within a kingdom, there are numerous lineages that have undergone unique adaptations, developed diverse ecological strategies, and occupied various habitats. The diversification and specialization of species within different environments and niches contribute to the higher level of variety observed within a kingdom compared to a single species.