In which of the positions given below, any person creates maximum pressure on earth ?

Options

A. While laying down on earth
B. While standing on earth
C. While standing in calm position
D. While standing on one leg

Explanation

To determine in which position a person creates maximum pressure on the Earth, we need to understand the concept of pressure. Pressure is defined as the force applied per unit area. The formula for pressure (P) is given by:

\[ P = \frac{F}{A} \]

Where:
- \( P \) = Pressure
- \( F \) = Force (in this case, the weight of the person)
- \( A \) = Area over which the force is applied

Now, let's analyze each option:

1. **While laying on the ground**:
- When a person lays down, their weight is distributed over a larger area (the surface area of their body in contact with the ground).
- Since the area (A) is large, the pressure (P) exerted is relatively low.

2. **While standing on the Earth**:
- When standing normally, the weight is distributed over the area of both feet.
- The area is still larger than when standing on one leg, so the pressure is moderate.

3. **While standing in a calm position**:
- This is similar to standing normally. The weight is distributed over both feet, resulting in moderate pressure.

4. **While standing on one leg**:
- In this position, all of the person's weight is supported by one leg.
- This means the force (weight) is concentrated over a smaller area (the area of one foot).
- Therefore, the pressure exerted on the ground is maximized because the area (A) is minimized.

Now, comparing all the scenarios, standing on one leg results in the maximum pressure on the Earth because the same weight is applied over a smaller area.

### Conclusion:
The position in which a person creates maximum pressure on the Earth is **while standing on one leg**.

### Final Answer:
D. While standing on one leg.

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