Flat-footed camels can walk easily in sandy deserts because

Options

A. pressure on the sand is decreased by increasing the area of the surface in contact.
B. pressure on the sand is increased by increasing the area of the surface in contact.
C. pressure on the sand is decreased by decreasing the area of the surface in contact.
D. pressure on the sand is increased by decreasing the area of the surface in contact.

Answer

**Step-by-Step Solution:**

1. **Understanding the Problem:**
- The question asks why flat-footed camels can walk easily in sandy deserts. We need to consider the concept of pressure and how it relates to the area of contact with the ground.

2. **Concept of Pressure:**
- Pressure is defined as the force applied per unit area. The formula for pressure (P) is:
\[ P = \frac{F}{A} \]
where \( F \) is the force (weight of the camel) and \( A \) is the area of contact with the ground.

3. **Analyzing the Camel's Feet:**
- Flat-footed camels have a larger surface area on the bottom of their feet compared to other animals. This large area helps distribute their weight over a larger surface.

4. **Effect of Area on Pressure:**
- Since pressure is inversely proportional to area, increasing the area of contact decreases the pressure exerted on the sand. This means:
\[ \text{If } A \text{ increases, then } P \text{ decreases.} \]

5. **Conclusion:**
- Because the camels have flat, wide feet, they exert less pressure on the sandy ground. This prevents them from sinking into the sand, allowing them to walk easily in the desert.

6. **Final Answer:**
- Flat-footed camels can walk easily in sandy deserts because pressure on the sand is decreased by increasing the area of the surface in contact.

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