Explain the exchanges involved in the encounter of Europeans, Native Americans, and Africans in the New World. Focus particularly on the ways in which all parties in the process—the conquerors as well as the conquered—were changed.

hello there, can you add the "following" multiple choices

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.