Working in the middle colonies was attractive because European immigrants

Working in the middle colonies was attractive because European immigrants wanted to farm the fertile soil.  The soil of many regions in the Americas was fertile and good for farming. That was the case of the Jamestown colony in Virginia or other middle colonies such as Maryland or Pennsylvania.

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the answer is a. the harappan civilisation is also called the indus valley civilisation, this is because they built their cities along the indus river. the reason behind this location can be found in the rest of the "old world" civilisations like mesopotamia or egypt, the first built their cities along the rivers tigris and euphrates, the second along the nil; : their respective civilisations thrived because the overflowing of their respective rivers produced favorable conditions for agriculture, their main support.