Name a machine by which harvesting and threshing both can be done.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a machine that can perform both harvesting and threshing.

2. **Identifying the Processes**:
- **Harvesting**: This is the process of cutting down mature crops.
- **Threshing**: This is the process of separating the grains from the harvested crops.

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