Which reducing agent is employed to get copper from the leached low-grade copper ore ?

Explanation

To determine which reducing agent is employed to extract copper from leached low-grade copper ore, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Low-Grade Copper Ore**:
- Low-grade copper ore contains a lower concentration of copper compared to high-grade ores. This means that direct extraction methods may not be efficient.

2. **Leaching Process**:
...