Question

plains and costal areas are densly populated​

Answer 1

Answer:

Pains the most densely populated areas of the world because these are fertile land where various crops can be cultivated. Apart from being fertile, plains are flat lands where means of transport can be easily built. It is also easier to build houses, roads and lay railway lines on flat plains.

Explanation:

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Answer 2

Answer:

plains and costal areas are densly ppopulated because they have suitable climatic conditions,fertile soil that is good for agriculture, good irrigation system,etc..