What factors may be responsible for losses of grains during storage?

Explanation

**Step-by-Step Solution:**

1. **Identify the Types of Factors:**
- There are two main categories of factors that can cause losses of grains during storage: biotic factors and abiotic factors.

2. **Biotic Factors:**
- These are living organisms that can negatively affect stored grains. Key examples include:
- **Insects:** They can infest the grains and consume them.
...