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Practice Reading: Multiple Choice, Single Answer ID: #46529 The final
Instructions ›
Read the text and answer the multiple-choice question by selecting the correct response. Only one response is correct.
The final major human cause of desertification is soil salinization resulting from overirrigation. Excess water from irrigation sinks down into the water table. If no drainage system exists, the water table rises, bringing dissolved salts to the surface. The water evaporates and the salts are left behind, creating a white crustal layer that prevents air and water from reaching the underlying soil.

The ground’s absorption of excess water is a factor in desertification because it can

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Option 4: "bring salts to the surface"

Explanation: This option is correct as it directly relates to the text, which explains that excess water from irrigation can raise the water table, bringing dissolved salts to the surface. This process is a key factor in desertification as it creates a crust that prevents air and water from reaching the soil.

Option 1: "interfere with the irrigation of land"

Explanation: This option suggests that excess water absorption interferes with irrigation, but the text does not mention any negative impact on irrigation itself. Instead, it focuses on how excess water contributes to soil salinization, which is a different issue.

Option 2: "limit the evaporation of water"

Explanation: This option implies that excess water absorption limits evaporation, which contradicts the text. The text states that excess water leads to evaporation, leaving salts behind, rather than limiting it.

Option 3: "require more absorption of air by the soil"

Explanation: This option suggests a need for more air absorption by the soil, which is not supported by the text. The text discusses how excess water leads to salinization, not air absorption.

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