Secondary treatment of the sewage is also called Biological treatment Justify this statement and explain the process.

Explanation

### Step-by-Step Solution:

1. **Understanding Secondary Treatment**:
- Secondary treatment of sewage is often referred to as biological treatment because it primarily relies on biological processes to remove organic matter from wastewater.

2. **Role of Microbes**:
- In secondary treatment, various microorganisms (bacteria, protozoa, etc.) play a crucial role in breaking down organic pollutants. These microbes metabolize the organic matter, leading to its degradation.

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