The process is called Erosion. During the Erosion, materials from one place such as soil and rocks will be transport to another location. The process is also contrast to the process called deposition which responsible for the control of the arrival of the materials to a new place like the rocks from Blue ridge Mountain to Virginia's Coast.
Answer:
A, the populations of producers and decomposers should be stable
Explanation:
The other three do not fit, only reasonable one is A
1. Smoking
2. Weight
3. Alcohol
4. Drugs
5. Depression
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