Answer: Subspecies (races).
- A Subspecies (races)
- B Separate genera
- C Separate families
- D Separate kingdoms
Correct answer: A. Subspecies (races)
Explanation: Geographically separated populations of a species can diverge slightly into subspecies or races while still one species.
The taxonomic hierarchy narrows from Kingdom (broadest, covering the most organisms but fewest shared traits) down to Species (narrowest, fewest organisms but most shared traits) - every level in between is a progressively more specific subset of the one above it.
Concept context
Biodiversity, taxonomy, binomial nomenclature, the taxonomic hierarchy, and taxonomic aids like herbaria and botanical gardens. The foundational first chapter of NCERT Biology.