It can be deduced that the global concern is indirectly responsible for all of the others is D. Human overpopulation.
What is population?
Population simply means the number of people who are living in an area.
In this case, overpopulation leads to pollution, deforestation, and resources depletion.
When there's overpopulation, it means that there'll be an increase in the people in the area. This leads to increase in pollution.
Also, this leads to deforestation as more trees will be cut down. It also brings about resource depletion as more people will use the available resources.
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