Discuss how classification systems have undergone several changes over a period of time?

Explanation

### Step-by-Step Text Solution

1. **Introduction to Biological Classification**:
- Biological classification is a scientific method of arranging organisms into a hierarchical structure based on their similarities and dissimilarities. This system helps in organizing the vast diversity of life forms into groups and subgroups.

2. **Early Classification Systems**:
- The earliest classification system was proposed by Aristotle, who introduced the **artificial system of classification**. In this system, organisms were categorized based on their habitat:
- **Aquatic**: Organisms living in water (e.g., fish).
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