Viscosity is the property of the liquids and gases which is more closely related to `"____".`

Options

A. elasticity
B. inertia
C. tension
D. friction

Answer

To answer the question, "Viscosity is the property of the liquids and gases which is more closely related to '____'", we need to understand what viscosity is and how it relates to the behavior of fluids.

### Step-by-Step Solution:

1. **Understanding Viscosity**:
- Viscosity is a measure of a fluid's resistance to flow. It describes how thick or sticky a fluid is. For example, honey has a higher viscosity than water because it flows more slowly.

2. **Fluid Dynamics**:
- Fluids, which include both liquids and gases, can flow. When a fluid flows, different layers of the fluid can move at different velocities. The layer in contact with a surface (like the bottom of a river) may not move at all, while layers above it can flow more freely.

3. **Relative Motion and Friction**:
- When there is relative motion between these layers, a frictional force arises due to the interactions between the molecules of the fluid. This frictional force is what we refer to as viscosity.

4. **Intermolecular Forces**:
- The viscosity of a fluid is influenced by the intermolecular forces present. Stronger intermolecular forces result in higher viscosity because the layers of the fluid resist moving past one another.

5. **Conclusion**:
- Therefore, viscosity is closely related to the frictional forces that occur between the layers of a fluid when they are in motion relative to each other.

### Final Answer:
Viscosity is the property of the liquids and gases which is more closely related to **friction**.

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