Final answer:
Ice sheets are not found in South America; deserts have little vegetation, sand or gravel soils, and low precipitation levels.
Explanation:
Ice sheets are not found in South America as they are typically associated with polar regions like Antarctica. Deserts, on the other hand, are characterized by little vegetation, sand or gravel soils, and low precipitation levels. For example, the Sahara Desert in Africa is known for its arid conditions and lack of vegetation.
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