A division is formed by combining several :–

Options

A. Orders
B. Families
C. Classes
D. Tribes

Answer

To answer the question "A division is formed by combining several:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Taxonomy**: Taxonomy is the science of classification of living organisms. It involves organizing species into hierarchical categories based on shared characteristics.

2. **Identify Taxonomic Ranks**: There are several taxonomic ranks in the hierarchy, which include:
- Kingdom
- Division (or Phylum)
- Class
- Order
- Family
- Genus
- Species

3. **Focus on Division**: The question specifically asks about the division. In taxonomy, a division (or phylum in zoology) is a higher taxonomic rank.

4. **Determine What Forms a Division**: A division is formed by combining several related classes. Classes are groups of orders that share common characteristics.

5. **Conclusion**: Therefore, the answer to the question is that a division is formed by combining several **classes**.

### Final Answer:
A division is formed by combining several **classes**.

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