The correct answer is (a) Upraon Abbal.
Upraon Abbal is a type of unirrigated fertile land in Uttarakhand. It is located in the upper reaches of the hills, above the Terai region. The land is fertile because it receives a lot of rainfall. However, it is not irrigated, so crops are grown only during the monsoon season.
Talaon Abbal is a type of irrigated fertile land in Uttarakhand. It is located in the lower reaches of the hills, below the Terai region. The land is fertile because it is irrigated by canals and rivers. Crops can be grown all year round.
Doyam is a type of land that is neither irrigated nor fertile. It is located in the middle of the hills, between Upraon Abbal and Talaon Abbal. The land is not fertile because it does not receive enough rainfall. It is also not irrigated, so crops cannot be grown.