In which of the following activities will you use minimum amount of water?

Options

A. Bathing
B. Brushing teeth
C. Washing clothes
D. Mopping a room

Answer

To determine which activity uses the minimum amount of water, we will analyze each activity mentioned in the question.

### Step-by-Step Solution:

1. **Identify the Activities**: The activities we need to consider are:
- Bathing
- Brushing teeth
- Washing clothes
- Mopping the room

2. **Analyze Water Usage for Each Activity**:
- **Bathing**: This activity generally requires a significant amount of water as you need to wash your entire body and hair. Therefore, it uses a lot of water.
- **Brushing Teeth**: This activity requires a minimal amount of water. You only need enough water to rinse your mouth and clean your toothbrush, making it the least water-consuming activity.
- **Washing Clothes**: This activity also requires a considerable amount of water to properly clean the clothes, especially if you are washing a full load.
- **Mopping the Room**: Mopping requires a good amount of water to effectively clean the floor and remove dust and dirt.

3. **Compare the Water Usage**:
- Bathing uses a lot of water.
- Brushing teeth uses the least amount of water.
- Washing clothes uses a lot of water.
- Mopping the room uses a lot of water.

4. **Conclusion**: After analyzing all the activities, we can conclude that **brushing teeth** uses the minimum amount of water compared to the other activities.

### Final Answer:
The activity in which you will use the minimum amount of water is **brushing teeth**.