Introduction:
Mining areas are often located in plateau areas because these regions are rich in mineral deposits. This is the correct answer to the given question.

Explanation:
Plateau areas:
Plateau areas are elevated flat lands or tablelands that are characterized by their relatively flat or gently sloping terrain. These regions are formed by geological forces such as volcanic activity, erosion, or tectonic uplift.

Rich in mineral deposits:
One of the main reasons mining areas are located in plateau areas is because these regions are often rich in mineral deposits. Plateaus are formed by various geological processes that can result in the concentration of minerals in the area. These minerals can include valuable resources such as coal, iron ore, copper, gold, silver, and many others. The geological processes that create plateaus can cause the deposition and concentration of these minerals, making them economically viable for mining.

Easy access to minerals:
Plateau areas offer easy access to mineral deposits due to their relatively flat or gently sloping terrain. This makes it easier for mining operations to extract the minerals and transport them to processing facilities. The flat or gently sloping terrain reduces the need for extensive excavation or complicated mining techniques, resulting in lower costs and increased efficiency for mining operations.

Environmental considerations:
In addition to the presence of mineral deposits, the choice of plateau areas for mining also takes into account environmental considerations. Plateau areas often have fewer ecological complexities compared to other types of landscapes, such as forests or wetlands. This makes it easier for mining operations to navigate the regulatory and environmental challenges associated with mining activities.

Conclusion:
Overall, mining areas are often located in plateau areas because these regions are rich in mineral deposits and offer easy access to these resources. The relatively flat or gently sloping terrain of plateau areas reduces mining costs and environmental complexities, making them ideal locations for mining operations. Therefore, option 'B' is the correct answer.