Chapter 3 "In the Earliest Cities" discusses in detail the Harappan civilization and its cities, such as Harappa and Mohenjodaro. It explains the architecture, urban planning, trade, crafts, and daily life of the people who lived in these ancient cities.
The NCERT Solutions for "Chapter 3: In the Earliest Cities" is available to download for free in PDF format, so that Class 6 students can use them for offline study.