Why Lucknow and Calcutta like cities developed in these plains?

Lucknow and Calcutta (Kolkata) developed in the fertile plains of the Ganges River due to their strategic locations for trade and agriculture. The alluvial soil in these regions supported rich agricultural activities, attracting settlers. Additionally, their positions as important cultural and administrative centers facilitated urban growth, making them hubs of commerce and governance in northern India. This combination of fertile land and trade opportunities contributed to their development as significant cities.