Why are liquids and gases categorised as fluids ?

Explanation

To answer the question "Why are liquids and gases categorized as fluids?", we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Definition of Fluids**:
- Fluids are defined as substances that have the ability to flow. This characteristic is fundamental to understanding why certain states of matter are classified as fluids.

2. **Characteristics of Liquids and Gases**:
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