Plain support more people unlike mountains or deserts because plains provides more better facilities, housing, educational services, service activities and easy availability of land for production. In short, it is populated so if it is populated you can expect that there are more advanced invention of technology or for human resources. While mountains have generally harsh climate with steep temperature drops between day and night. High winds, runoff from melting snow and rain cause high levels of erosion and thin, immature soils. Despite these challenges, mountain living is ideal for some people who appreciate peace, quiet and the chance to inhabit own little slice of untouched nature. Obviously people don't like living in desert as it is extremely dry and people need so much water, there is no lot of vegetation and plants only appear after rainfall thus it makes more difficult for human life to persist because there is always risk of running out of food.
Plains provide better water facilities and easy availability of land for the production, housing, educational and service activities.
It is easy to set up buildings and working centres and road and railway networks on plains rather than on mountains and plateaus. People always get attracted towards better developed areas and since the plains are more populated and support more people than mountains or deserts or plateaus.
Based on the information provided within the question it can be said that the type of corporation being mentioned is a joint-stock company. This is a business entity where all the share's of the company have been bought and are held solely by the shareholders. This allows the shareholders to transfer or sell their shares to others without affecting the companies existence.
