Which people of the indus river valley left a significant amount of literature yet no architectural artifacts, making it difficult to determine their origins?

The people of the Indus River Valley who left a significant amount of literature yet no architectural artifacts, were the Aryan people. That made it difficult to determine their origins were.

"Aryan" was a term used as self-designation by Indo-Iranian people. The term was used by the Indic people of the Vedic period in India as an ethnic label for themselves and to refer to the noble class.

the answer is c my brotha. c.   formed an alliance with the soviet union.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.