Correct Answer: Gulf of Mannar

Solution : The correct answer is the Gulf of Mannar .

The Gulf of Mannar, situated in the Laccadive Sea, is a broad and shallow bay within the Indian Ocean, with a minimum depth of 5.8 metres. Situated on the southeastern edge of the Indian subcontinent, the Gulf of Mannar is renowned for its incredible biodiversity, hosting more than 3,600 species of flora and fauna. Covering an expansive surface area of 10,500 square kilometres (4,100 square miles), the Gulf of Mannar stands as a vital marine ecosystem supporting a wide range of marine life.