Final answer:
Mountains and valleys in the Northwest Territory made it appealing for settlement due to arable land, rivers, and scenic beauty.
Explanation:
Mountains and valleys were a pair of geographic features in the Northwest Territory that made it attractive for settlement in the late 1700s. The presence of arable mountains, rich cultivated valleys, numerous sources of rivers such as the Delaware and Susquehanna, and the scenic beauty of the region all contributed to its appeal for settlement.
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