WORLD HISTORY

Detailed explanation-1: -The Indus cities are noted for their urban planning, a technical and political process concerned with the use of land and design of the urban environment. They are also noted for their baked brick houses, elaborate drainage systems, water supply systems, and clusters of large, nonresidential buildings.

Detailed explanation-2: -The earliest form of irrigation probably involved people carrying buckets of water from wells or rivers to pour on their crops. As better techniques developed, societies in Egypt and China built irrigation canals, dams, dikes, and water storage facilities.

Detailed explanation-3: -The correct answer is Dholavira.

Detailed explanation-4: -The dry spell, lasting 900 years, slowly destroyed its irrigation systems, devastated agriculture and eventually forced Indus people at places such as Harappa and Mohenjo-Daro to abandon the thriving urban culture.