Which statement is TRUE, according to the passage?l

Câu hỏi :

Which statement is TRUE, according to the passage?

A. Surface water contamination affects an ecosystem as the whole.

B. Soil contamination is not related to ecosystem.

C. Groundwater contamination can never happens.

D. Air contamination is the most serious in wetlands.

* Đáp án

A

* Hướng dẫn giải

Dẫn chứng: Changes in the water chemistry due to surface water contamination can affect all levels of an ecosystem. 

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