Answer:
it is because it has plain, fertile land with alluvial soil and plenty of water for irrigation and agriculture.
Explanation:
Terai region lies in the southern part of Nepal. It covers an area of 25,020 sq. km making about 17% of the total area of the country. It is called the 'Granary of Nepal' because it has plain, fertile land with alluvial soil and plenty of water for irrigation and agriculture.
The correct answer is most likely flat-top mounds with hierarchy of government. The area was known for building large, eastern platform mounds, and often shaped mounds as well.
Ogist means that you study the subject. For instance Egyptology is the study of Egypt, change it to add the ogist and it becomes at studier of Egyptology. Hope this helps!