Your answer to your question: Deltas have a rich accumulation of silt, so they are usually fertile agricultural areas.
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Answer:
look u jus have to subtract and extract
Explanation:
Answer: (B) complex mountainous region in the western U.S
Explanation: The North American Cordillera covers extensive chains of mountain ranges, plateaus, basins. It covers a length of 6400km.
There are 3 mountain systems in the North American cordillera region.
1. Pacific border province.
2.,The rocky mountain systems.
3. Cascade-Sierra mountains.