Final answer:
The subject of this question is Geography. China is identified as having the worst acid deposition problem due to coal-fired electrical and industrial plants.
Step-by-step explanation:
The subject of this question is Geography. It pertains to the issue of acid deposition, which is the accumulation of acids or acidic compounds in the atmosphere that later fall to the Earth's surface. Acid deposition is mainly caused by various human activities such as burning fossil fuels which release sulfur dioxide and nitrogen oxides, leading to the formation of sulfuric acid and nitric acid.
In the given options, China is identified as having the worst acid deposition problem due to coal-fired electrical and industrial plants. These plants emit pollutants that contribute to the formation of acid rain. Acid deposition can have harmful effects on soil, water, vegetation, and aquatic life.
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