Because of the rich soil, migration has taken place to South Asia's
A. gorges in the mountains
B. Himalayas
C. plateau regions
D. flood plains
D?
Right.
Yes, the correct answer is D. flood plains.
To arrive at this conclusion, you need to consider the given information about the rich soil in South Asia. People generally migrate to areas with fertile soil because it sustains agriculture and provides a reliable food source.
Among the options, gorges in the mountains (A) and the Himalayas (B) do not provide suitable conditions for agriculture due to their steep and rocky terrain. Plateau regions (C) can have fertile soil, but they are not specifically mentioned in the question. However, flood plains (D) are known for their fertile soil due to regular flooding, which deposits nutrient-rich sediment, making them ideal for farming.
Therefore, based on the given information, we can conclude that migration has taken place to South Asia's flood plains.