Highest level of biological organisation, is

Options

A. Kingdom
B. Phylum
C. Division
D. Domain

Answer

To determine the highest level of biological organization among the given options (Kingdom, Phylum, Division, and Domain), we can follow these steps:

### Step-by-Step Solution:

1. **Understand Biological Organization**: Biological organization refers to the hierarchical structure of living organisms, ranging from the smallest unit (like cells) to the largest (like ecosystems).

2. **Identify Taxonomic Categories**: The question relates to taxonomic categories, which are used to classify living organisms based on their similarities and differences.

3. **List the Taxonomic Hierarchy**: The modern taxonomic hierarchy consists of eight categories, ranked from highest to lowest:
- Domain
- Kingdom
- Phylum
- Class
- Order
- Family
- Genus
- Species

4. **Determine the Highest Level**: Among the options provided (Kingdom, Phylum, Division, Domain), we need to identify which is the highest level in the taxonomic hierarchy.

5. **Conclusion**: The highest level of biological organization is the **Domain**. Therefore, the correct answer to the question is **Domain** (Option 4).