What is Red Data Book?

Explanation

### Step-by-Step Solution:

1. **Definition of Red Data Book**: The Red Data Book is a comprehensive state document that serves as a record for various species.

2. **Purpose**: Its primary purpose is to document endangered and rare species of plants, animals, fungi, and local species that exist within a specific state or country.

3. **Identification of Species**: The Red Data Book helps identify which species are on the verge of extinction, which are rare, and which are at risk of dying out.

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