B two plates slide past each other
Answer:
It is extremely important economically.
Explanation:
The Hai River and its tributaries form one of the most important river basins in China. Because it flows through a heavily populated area and also one used intensively for agricultural purposes, the river is essential for irrigation and also for human water supply.
The river and its tributaries connect the Chinese capital of Beijing to another one of the nation's largest urban agglomerations, Tianjin.
I don't understand this question
The lower levels of the pyramid must also grow-for more people to consumer higher-end items, there must be more people to make those items.
