Which of the following statements best describes the ecological and hydrological characteristics of Kanwar Jheel (Kabartal), Bihar's only Ramsar site?

Options:

• A: It is a tectonic lake fed by Himalayan glacial melt, acting as a perennial deep-water reservoir.
• B: It is a freshwater oxbow lake formed by the meandering of the Burhi Gandak River, acting as a vital refuge for several critically endangered vulture and migratory bird species.
• C: It is a brackish water lagoon formed by the deltaic deposition of the Ganga River, supporting extensive mangrove vegetation.
• D: It is an artificial reservoir constructed during the British era to control seasonal floods in North Bihar.

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