The dams of water reservoir are made thick near the bottom. Why?

Explanation

### Step-by-Step Solution:

1. **Understanding Pressure in Fluids**:
- Pressure in a fluid increases with depth. This is due to the weight of the fluid above pushing down on the fluid below. The formula for pressure at a certain depth (h) in a fluid is given by:
\[ P = h \cdot \rho \cdot g \]
where \( P \) is the pressure, \( h \) is the depth, \( \rho \) is the density of the fluid, and \( g \) is the acceleration due to gravity.
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