Explanation:

None of the statements are correct.
Katchal Island

• It is part of the Nicobar Islands and is located to the south of Sentinel Island.
• The world’s third largest mangrove forest is the Florida Mangroves.
• The United States National Aeronautics and Space Administration (NASA) recently highlighted the loss of mangrove cover on Katchal island, a part of India’s Nicobar archipelago.
• The mangrove cover on Katchal will not come back.
• However, in other places, mangroves have reappeared since they propagate themselves through propagules.
• A propagule is a vegetative structure that can become detached from a plant and give rise to a new plant.
• Examples include a bud, sucker, or spore.

Hence option 4th is correct.