What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.

Explanation

### Step-by-Step Solution:

1. **Definition of Center of Buoyancy**:
The center of buoyancy is defined as the point in a submerged or floating body where the buoyant force, which acts upward against the weight of the body, can be considered to act. This point is the centroid of the displaced fluid volume.

2. **Understanding Buoyant Force**:
When a body is submerged in a fluid, it experiences an upward force known as buoyancy. This force arises due to the pressure difference between the top and bottom of the submerged part of the body.

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