Which of the following best explains why the Rhine-Ruhr area became a major industrial area?

It is centrally located in Europe.
It has major iron and coal deposits.
It has a large population.
It has flat land and rich soil.

It has major iron and coal deposits.

It has beautiful river access for transporting goods and people all over Europe and even to the North Sea for a link to the rest of the world. Good grief ! Has no one seen the traffic even now?

Apologies for missing that important point. Yes, the access to the Rhine River for transportation of goods and people has played a significant role in the industrial development of the Rhine-Ruhr area. The river served as a vital trade route, allowing for easy transportation of raw materials such as coal and iron ore, as well as finished products to other parts of Europe and beyond. This advantage, combined with the region's iron and coal deposits, contributed to the growth and success of the area's industrial sector. Thank you for pointing that out.