The islands have not be left behind as they also boast of rivers such as the Borneo and the Indonesian rivers. Extensive lowland is also another feature that is evident in the region and is separated by the mountain ranges and the forested hills. As a resulted of the physical conditions in the region, the people are taking part in rice planting on the fertile plains. This is seen in places such as Burma and Vietnam. Long coastlines have formed an important physical aspect of the region that promotes trade among the people and movement from one region to another. Another evident physical feature in the region is the presence of the seas that are marked by shallow ends and few deep underground trenches. As a result, they are warm throughout the year and are not saline. These conditions are favorable for the growth and prevalence of sea fish, coral, and seaweeds. The region’s landscape is dominated by mountains whose peaks are below ten thousand feet. The mountains form a very integral part of the region as they seem to create political and geographical boundaries. Indian and China are separated by the Northern and Western highlands thus forming a major factor that separates the two regions. Cordilleras in the region are three and seem to run north to south. The cordilleras include a Bilauktaung range that lies between Thailand and Myanmar, the Arakan Yoma range that is located in western part of Myanmar and the Annam Cordillera that marks the boundary between Vietnam, Laos, and Cambodia.