Which One of the Following Statements Correctly Describes How Stream

question 34

Multiple Choice

Which one of the following statements correctly describes how stream terraces can form?

• A) Base level rises; the stream downcuts, and the old floodplain is left well above the elevation of the present- day channel.
• B) A temporary base level is eliminated; the stream builds its channel upstream from the old temporary base level, and the former floodplain is left well above the present elevation of the stream.
• C) A temporary base level is eliminated; the stream downcuts upstream from the old temporary base level, and the former floodplain is left well above the present elevation of the stream.
• D) Base level drops; the stream aggrades its channel, and the former floodplain is left below the present elevation of the stream.

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