Explanation : The Indus Valley civilization is noted for its cities built of brick, roadside drainage system, and multistoried houses which other Bronze Age civilizations lacked to the extent that the Indus people had. The Drainage System of the Indus Valley Civilization was quite advanced. The drains were covered with slabs. Water flowed from houses into the street drains. The street drains had manholes at regular intervals. ....Read more