How is the humic acid of soil neutralized in the stomach of earthworm.

Explanation

**Step-by-Step Solution:**

1. **Understanding Humic Acid**: Humic acid is an organic compound found in soil, resulting from the decomposition of organic matter. It can be acidic in nature.

2. **Role of Earthworm's Stomach**: The stomach of an earthworm plays a crucial role in processing the soil and organic matter it ingests.

3. **Presence of Calciferous Glands**: In the stomach of the earthworm, there are specialized glands known as calciferous glands.

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