The correct answer is C) provides many excellent harbors.
The jagged shoreline of the Northeast provides many excellent harbors.
The Northeast harbors in the United States is a great place for sailing. The jagged shoreline of this region provides many natural harbors. It is a beautiful place to admire nature and to contemplate the sea. Many people go to this region to sail their boats and that is why it is a recreational place in the Northern part of the US.