Some people in Manipur live in houses built on floating islands of weeds and decaying vegetation held together by suspended silt. These islands are called

1. The question describes houses built on floating islands made of weeds and decaying vegetation held by silt, found in Manipur. 2. This description perfectly matches the unique ecosystem of Loktak Lake in Manipur. 3. These naturally occurring floating islands, which are heterogeneous masses of vegetation, soil, and organic matter, are locally known as 'Phoomdis'. 4. People live on some of these larger Phoomdis in traditional huts. 5. Options analysis: (A) Tipis are conical tents of North American indigenous peoples. (B) Barkhans are crescent-shaped sand dunes. (D) Izba is a traditional Russian log house. 6. Therefore, the correct term for these floating islands is Phoomdis.