The diagram is a simplified model of four Earth systems—the atmosphere, hydrosphere, biosphere, and geosphere—and the changes that their interactions cause.
Which statement is MOST USEFUL for explaining or using this model?
A. The causes and effects of a specific global change are confined to one Earth system only.
B. Only one Earth system causes a specific global change, but all Earth systems could be affected.
C. All Earth systems may interact to cause a specific global change, but only one Earth system is affected.
D. Both the causes and effects of global change may involve all Earth systems.
Answers: 1
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