The correct answer is Shortughai. Shortugai and Mundigak are the only Indus Valley Civilization sites in Afghanistan. Indus Valley Civilization was a Bronze Age civilization spread across the whole of Pakistan and the north-western part of India. It was discovered by Dayaram Sahni in 1921 with the discovery of Harappa. Shortugai is located in the Takhar Province in Afghanistan. The Indus Valley Civilization was spread from present-day North-East Afghanistan to Pakistan and North-West India. The civilization flourished in the river basins of the Ghaggar-Hakra river and the Indus. Additional InformationIndus valley civilization is one of the four oldest civilizations in the world. It is also known as Harappan Civilization and is well-known for its organized planning based on the grid system. John Marshall was the first researcher to use the term, 'Indus Valley Civilization'. Indus Valley Civilization spread from the year 2500 ‚¬€œ to 1750 BC according to radio-carbon dating. The most distinctive feature of the Harappan Civilization was its urbanization. Moreover, sheep and goats, dogs, humped cattle buffalo, and elephants were domesticated in the Indus Valley Civilization. The capital cities are Mohenjodaro and Harappa. The port cities are Sutkagendor, Balakot, Lothal, Allahdino, and Kuntasi. The Indus valley people were well-acquainted with the use of both cotton and wool.