Sundarban was declared a 'World Heritage Site' primarily for its:
- ATiger reserve
- BSundari tree
- CMangrove forest
- DBiodiversity
Solution & Step-by-step Explanation
The Sundarbans National Park was inscribed as a UNESCO World Heritage Site in 1987 due to its status as the world's largest contiguous mangrove forest, showcasing unique halophytic ecological adaptations and complex intertidal food webs.