The two statements made by the student highlight different important functions of soil.
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"Soil can act as a filter and keep pollutants out of groundwater." - This statement describes a vital ecological function of soil. It emphasizes soil's role in maintaining water quality and protecting aquifers by filtering pollutants.
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"Soil can be used as a natural building material." - This statement addresses the practical and historical use of soil in construction. It highlights how soil has been utilized in various building techniques, such as adobe or earthen structures.
In summary, both statements describe the importance of soil, but they focus on different aspects: one on the environmental function of soil in protecting water resources and the other on its utility in construction. These statements illustrate the multifaceted significance of soil in both ecological and human contexts.