Economically speaking, what has been the trend in east asian countries over the past six decades?

B) their economies have shifted from agriculture to manufacturing

Explanation:

East Asian countries moved into manufacturing. Many companies from High-Income Countries (HICs) began to manufacture products in Asia due to the  low cost for labor, land and resources. This was only increased by the reliability and technological developments by transport options. Urbanization happened faster as the agricultural industry needed less labor intensive workers and more machine operated farming equipment on a commercial scale. The populations also rose dramatically and the labor prices stayed down.

As the ocean is more covered with the sea, streams, rivers, and other bodies of water, most of the precipitation falls back into them. The percentage of the precipitation that falls back into land is estimated to be 22%. Thus, the answer is letter D.