Concept:Loktak is the largest freshwater lake in Northeast India, located in Manipur.Explanation:Loktak Lake is known for its floating biomass called phumdis.It supports Keibul Lamjao National Park, the world’s only floating national park.This park is the natural habitat of the endangered Sangai deer.The lake is vital for agriculture, fishing, and hydropower, earning the name “Lifeline of Manipur.”Answer:Option A: Lake