Question

Why is the Indus Valley Civilization sometimes called the Harappan culture​

Answer 1

Answer:

Harappa, the first of its sites to be excavated early in the 20th century in what was then the Punjab province of British India and now is Pakistan.

Answer 2

till the second decade of the 20th Century, historians were unaware that highly developed civilization flourished in India in about 2500BCE.

This is Known as the Indus valley civilization or the Harappan civilization