## CORE INFORMATION\n✓ **Answer**: C\n## CONCEPT FRAMEWORK\n **Primary Concept**: Taxonomy and Taxonomic Hierarchy\n **Related Topics**: Classification of organisms, Phylogeny, Systematics\n **Prerequisites**: Basic understanding of biological classification systems.\n## SOLUTION PATHWAY\n**Given Information**:\nThe question asks for the definition of a taxon.\n**Method & Steps**:\n1. Understanding the term 'taxon'.\n Reasoning: A taxon refers to a group of organisms that are classified together based on shared characteristics and evolutionary relationships. It can be at any level of the taxonomic hierarchy.\n Formula/Rule: None directly applicable.\n2. Analyzing the options.\n Working: Option A is too narrow, focusing only on species. Option B and D are incorrect as taxa encompass both plants and animals and all life forms.\n 3. Selecting the correct option.\n Result: Option C accurately defines a taxon as a group of organisms at any level of the taxonomic hierarchy (Kingdom, Phylum, Class, Order, Family, Genus, Species).\n Verification: The definition aligns with the standard biological understanding of the term 'taxon'.\n## OPTION ANALYSIS\nA :x: Specifically a group of species - This is too restrictive. Taxa can be at any level of the hierarchy, not just species.\nB :x: Only used for plants - Incorrect. Taxa are used for all organisms.\nC ✓: A group of organisms at any level of taxonomic hierarchy - This is the correct and comprehensive definition.\nD :x: Only used for animals - Incorrect. Taxa are used for all organisms.\n## LEARNING AIDS\n **Common Mistakes**:\n 1.Confusing taxon with species: Remembering that a taxon is a broader term encompassing various levels of classification.\n 2.Restricting taxa to specific kingdoms or phyla: Understanding that taxa apply to all living organisms.\n **Quick Tips**:\n 1.Think of the hierarchical levels (Kingdom, Phylum, etc.) as examples of different taxa.\n 2.Remember that 'taxon' is a general term for any taxonomic group.