Why did marking the high elevation points determine the watersheds edge

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas

What is the identity of the planets?