Why are plains densely populated?

Plains are densely populated because they offer fertile soil, which is ideal for agriculture. The flat land is easier to cultivate and supports the growth of crops, providing food for large populations. Plains are also often located near rivers, which supply water for irrigation and other needs. These areas have good transportation networks, making trade and communication easier. Due to these advantages, plains attract more settlements and are centers of economic activities. Additionally, their mild climate and accessibility make them suitable for human habitation.

This question related to Chapter 3 Social Science Class 6th NCERT.
From the Chapter 3. Landforms and Life.
Give answer according to your understanding.