What is the first classification or grouping within the animal or plant kingdom?

• A. Phylum
• B. Family
• C. Class
• D. Order

Answer: (A)

Biological classification stacks living things in a hierarchical system to show relatedness. When you move from the kingdom level to the next broad grouping, you reach the phylum. This level groups organisms by major structural and developmental traits that define large body plans. For animals, phyla separate groups by fundamental features like having a backbone or a particular body organization; for plants, divisions (often treated like phyla) cluster plants by major organizational traits. Since Domain sits above Kingdom, the first subdivision you encounter inside a kingdom is phylum.