Give a brief description of the Red Data Book.

Explanation

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

1. **Introduction to the Red Data Book**: The Red Data Book is a comprehensive document created by the International Union for Conservation of Nature (IUCN). It serves as a critical tool for assessing the conservation status of various species of plants and animals.

2. **Purpose of the Red Data Book**: The primary purpose of the Red Data Book is to provide information on the status of different species, highlighting those that are threatened or endangered. It aims to raise awareness about the conservation needs of these species.

3. **Categories of Species**: The Red Data Book classifies species into seven distinct categories based on their conservation status:
- **Extinct**: Species that no longer exist.
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