Define the following:
Red data book

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Red Data Book**: The Red Data Book is a comprehensive document that is maintained by a state or nation to record information about rare and endangered species of plants and animals.

2. **Purpose of the Red Data Book**: The primary purpose of the Red Data Book is to provide a record of species that are at risk of extinction. It highlights species that are rare, meaning they are not commonly found, and endangered, meaning they are on the verge of extinction if conservation measures are not implemented.

3. **Contents of the Red Data Book**: The Red Data Book contains detailed information about various species, including their population status, distribution, and the threats they face. It also includes a "Red List" that specifically lists endangered species, indicating their population trends and the urgency of conservation efforts needed.

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