Correct Option: A

The most characteristic feature of the Harappan Civilization was its urbanization. The cities show evidence of an advanced sense of planning and organization. The town was extremely well planned. The street ran straight and at right angles to each other following the grid system. The rectangular town planning was unique to the Harappans and was not known in Mesopotamia or Egypt. The streets were very wide and the houses built of burnt bricks lined both sides of the street. In Egypt and Mesopotamia dried or baked bricks were used.