Where is South Asia's most fertile farm land?

FERTILE PLAINS

When the rivers overflow their banks, they deposit this soil on alluvial plains, lands that are rich farmlands. As a result, the Indo-Gangetic Plain is one of the most fertile farming regions in the world. The Indo-Gangetic Plain is also the most heavily populated part of South Asia.

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Where is the map from the question?

The reason why i feel that the theory of plate tectonics is correct because scientists have found dinosaur bones of the same species in africa, asia, and in the americas. which means that they must have been together at one point in time. plate tectonics is also how the hawaiian islands were formed. as the plate hawaii is on was moving north west, magma would melt through the sea bottom and hardening. forming into the island chain. plate tectonics also explains the mariana trench. two plates were moving away from each other and made a giant crack in the ocean floor running 2,550 kilometers (1,500 miles)  long.