Now a days ________performs all the three tasks—harvesting, threshing and winnowing.

Options

A. sprinkler
B. combine harvester
C. sickle
D. harvester

Answer

**Step-by-Step Solution:**

1. **Understanding the Tasks:**
- The question asks about a machine that performs three agricultural tasks: harvesting, threshing, and winnowing.
- First, let's define these tasks:
- **Harvesting**: This is the process of cutting and gathering mature crops from the fields.
- **Threshing**: After harvesting, threshing is the process of separating the grains from the stalks and husks. This is typically done by beating the harvested crops.
- **Winnowing**: This is the process of separating the chaff (the unwanted parts) from the grains. It involves tossing the mixture into the air so that the lighter chaff is blown away by the wind while the heavier grains fall back down.

2. **Identifying the Machine:**
- The machine that performs all three tasks is called a **combined harvester**.
- A combined harvester is designed to efficiently harvest crops and simultaneously perform threshing and winnowing, making it a versatile tool in modern agriculture.

3. **Eliminating Other Options:**
- Other options mentioned in the video, such as a sprinkler, sickle, and harvester, do not perform all three tasks:
- A **sprinkler** is used for irrigation, not for harvesting or processing crops.
- A **sickle** is a manual tool used only for harvesting.
- A **harvester** typically refers to a machine that may only harvest crops without performing threshing or winnowing.

4. **Conclusion:**
- Therefore, the answer to the question is that a **combined harvester** performs all three tasks: harvesting, threshing, and winnowing.

**Final Answer:**
Now a days **combined harvester** performs all the three tasks—harvesting, threshing and winnowing.

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