Sulphide ore is concentrated by which method?

Explanation

### Step-by-Step Solution:

1. **Identify the Type of Ore**: The question specifically asks about the concentration method for sulphide ores. Sulphide ores are a category of ores that contain metal sulfides.

2. **Method of Concentration**: Sulphide ores are primarily concentrated using the **Froth Flotation Method**. This method is particularly effective for separating hydrophobic materials from hydrophilic materials.

3. **Process Overview**:
- **Preparation**: The sulphide ore is first crushed and ground to a fine size to increase the surface area for the process.
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