Question

Why have the Rhine Valley provinces of Alsace and Lorraine been a source of conflict between France and Germany?

The richest farmland in France is in these provinces.
France's busiest seaport is located in this region.
High mountains provide good natural defenses.
The region is rich in iron ore and coal.

Answer 1

The region is rich in iron ore and coal.

Step-by-step explanation:

Answer 2

The region is rich in iron ore and coal.

the region wealth of mineral deposits was a major bone of contention between the two powers. France had lost these rich provinces to the Prussians or Germans during the Franco-Prussian wars and was one of the major reasons why France had to seek colonies and also participate in the wars.