The answer follows the chapter section headed ‘Why Should We Study Social Science?’
Social Science explains how everyday systems—housing, water, roads, schools, markets and digital spaces—developed, function and affect different groups. It helps us understand cultural and occupational diversity, participate responsibly in democracy, and analyse shared problems such as public health, employment, urban growth and environmental protection. By connecting past decisions with present conditions, it also helps citizens make better choices for the future.
The answer paraphrases the explanation immediately following the printed question.
Differences in language, customs and occupations arise because communities have developed in varied geographical settings and through distinct historical, cultural and economic experiences. Climate, resources, migration, trade, political institutions and inherited traditions shape how people live. The chapter adds that these variations coexist with cultural connections that create an underlying unity and shared identity within India.
This model explanation applies the chapter’s historical, geographical, cultural and economic framework to continuity.
Differences continue when families and communities transmit language, knowledge, skills, beliefs and customs across generations and adapt them to new conditions. Geography and economic activity can reinforce regional patterns, while institutions and collective memory preserve identity. Continuity is not complete sameness: interaction, migration and technology change traditions even as communities retain important elements.