Which One of the Following Statements Correctly Describes How Stream

question 11

Multiple Choice

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

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

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