How are grains stored and protected?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Importance of Grain Storage**: Grains are essential crops that need proper care to maintain their quality. They can be affected by moisture, which can lead to the growth of microorganisms.

2. **Identifying the Threats**: Moisture is a significant threat to grain storage. When grains are exposed to moisture, it can attract microorganisms that can spoil the grains and reduce their value.

3. **Storage Structures**: To protect grains from moisture and other environmental factors, they are stored in large structures known as silos or granaries. These structures are designed to keep the grains safe.

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