West Bengal has the highest mangrove cover in India.

Explanation:

Mangroves are salt-tolerant trees and shrubs that grow in coastal areas, brackish water, and estuaries. They play a crucial role in protecting the coastline from erosion, providing habitats for various species, and acting as a carbon sink.

Here is the explanation of why West Bengal has the highest mangrove cover in India:

1. Sundarbans:
- The Sundarbans, located in West Bengal, is the largest mangrove forest in the world. It covers a significant portion of the state's coastline.
- It is a UNESCO World Heritage Site and a Ramsar Site, highlighting its importance and ecological significance.
- The Sundarbans is home to the iconic Royal Bengal Tiger and various other endangered species such as the Indian python, saltwater crocodile, and river terrapin.

2. Ganges-Brahmaputra Delta:
- The Ganges-Brahmaputra Delta, also known as the Bengal Delta, is the largest delta in the world and is primarily located in West Bengal.
- The deltaic region provides ideal conditions for mangrove growth due to the high sedimentation rate and the presence of numerous rivers and distributaries.
- The deltaic region is constantly replenished with sediments carried by the Ganges, Brahmaputra, and other rivers, creating a favorable environment for mangrove forests.

3. Conservation efforts:
- The West Bengal government has taken several initiatives to protect and conserve the mangrove cover.
- The Forest Department has established numerous protected areas and wildlife sanctuaries to safeguard the mangroves and the species that inhabit them.
- Community-based conservation programs have also been implemented, involving local communities in the sustainable management of mangrove forests.

4. Importance of mangroves:
- Mangroves act as a natural barrier against storms, tidal waves, and tsunamis, protecting the coastline from erosion and reducing the impact of natural disasters.
- They serve as breeding and nursery grounds for various fish species, supporting fisheries and providing livelihood opportunities for coastal communities.
- Mangroves also sequester large amounts of carbon dioxide, helping mitigate climate change.

In conclusion, West Bengal has the highest mangrove cover in India due to the presence of the Sundarbans, the favorable conditions provided by the Ganges-Brahmaputra Delta, and the conservation efforts undertaken by the state government.