Historians are concerned with accuracy of their writings and readings but are also aware of inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try

Historians are concerned with accuracy of their writings and readings but are also aware of "inability of authors to know every angle of every story".

Please correct me if I'm wrong :)

there are many answers to this question, such as a diplomat, ambassador, soldier, united nations employee, cia, etc.

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.