How do storage grain losses occur?

Explanation

**Step-by-Step Solution:**

1. **Understanding Storage Grain Losses**: Storage grain losses refer to the reduction in the quantity and quality of stored grains over time. These losses can be significant and impact food security.

2. **Identifying Factors of Loss**: The losses in stored grains occur due to two main categories of factors: biotic factors and abiotic factors.

3. **Biotic Factors**:
- Biotic factors are living organisms that can cause damage to stored grains.
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