What is the name of the portion of alimentary canal which crushes the food ?

Options

A. Crop
B. Gizzard
C. Oesophagus
D. Stomach

Explanation

**Step-by-Step Solution:**

1. **Understanding the Alimentary Canal**: The alimentary canal is a long tube that runs from the mouth to the anus and is responsible for digestion and absorption of food.

2. **Identifying the Options**: The question provides four options: Crop, Gizzard, Oesophagus, and Stomach. We need to determine which part of the alimentary canal is responsible for crushing food.

3. **Analyzing Each Option**:
- **Crop**: This is a storage organ found in birds. It holds food temporarily but does not crush it.
- **Gizzard**: This is a muscular part of the digestive system in birds that grinds and crushes food, often with the help of small stones that birds ingest.
- **Oesophagus**: This is the food pipe that transports food from the mouth to the stomach. It does not perform any crushing or digestion.
- **Stomach**: This organ is involved in digestion, particularly of proteins, but it does not physically crush food like the gizzard.

4. **Conclusion**: Based on the analysis, the gizzard is the correct answer because it specifically functions to crush and grind food in birds.

5. **Final Answer**: The portion of the alimentary canal that crushes the food is called the **Gizzard**.

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