What are the uses of algin ?

Explanation

### Step-by-Step Solution:

1. **Definition of Algin**:
- Algin is a type of carbohydrate that is primarily extracted from brown seaweed. It can also be produced by some bacteria.

2. **Source of Algin**:
- The main source of algin is brown seaweed, which is found in marine environments. Additionally, certain bacteria are known to produce algin.

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