Fill up the blanks
________and________ play a major role in maintenance of forest reserves.

Explanation

To fill in the blanks for the statement "________ and ________ play a major role in the maintenance of forest reserves," we need to identify two key entities involved in the conservation and protection of forests and wildlife.

1. **Identify the first entity**: The first entity that plays a major role in the maintenance of forest reserves is **National Parks**. National Parks are protected areas established by the government to preserve wildlife and their habitats. They are crucial for biodiversity conservation and provide a safe environment for various species.

2. **Identify the second entity**: The second entity is **Wildlife Sanctuaries**. Wildlife Sanctuaries are areas that provide a natural habitat for animals and birds. They can be managed by government bodies or private organizations and are essential for protecting certain species and their ecosystems.

Thus, the completed statement is: **"National Parks and Wildlife Sanctuaries play a major role in the maintenance of forest reserves."**