In soil, why do very deeply sown seeds fail to germinate?

Explanation

### Step-by-Step Solution:

1. **Understanding Germination**: Germination is the process by which a dormant seed transforms into a living plant. This process is crucial for the growth of the seed.

2. **Seed Structure**: Seeds contain an embryo, which is the part that will develop into the plant. For the seed to germinate, the embryo needs to grow and expand.

3. **Importance of Oxygen**: Oxygen is essential for the germination process. It is required for cellular respiration, which provides the energy needed for the seed to grow.

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