Choose the correct option for each question. There is only one correct response for each question.
Which of these is a disadvantage of friction?

Options

A. Writing
B. Applying brakes
C. Movemetn of vehicles
D. Increased fuel consumption

Answer

To solve the question regarding the disadvantages of friction, we will analyze the options provided and identify the correct response.

### Step-by-Step Solution:

1. **Understanding Friction**:
- Friction is a force that opposes the relative motion of two surfaces in contact. While it has many advantages, such as providing grip and enabling movement, it also has disadvantages.

2. **Identifying Disadvantages of Friction**:
- One of the main disadvantages of friction is that it can lead to increased fuel consumption in machines and vehicles. This is because energy is required to overcome the frictional force between moving parts.

3. **Evaluating the Options**:
- We need to look at the options provided (not listed here) and identify which one specifically mentions increased fuel consumption or any similar negative impact caused by friction.

4. **Selecting the Correct Option**:
- Based on the analysis, if one of the options states that friction leads to increased fuel consumption, that would be the correct answer. This is because friction causes machines to work harder, thus consuming more fuel.

### Conclusion:
- The correct option that represents a disadvantage of friction is "increased fuel consumption."

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