Contextual explanation: Socioeconomic group defined by occupation and income. 
Working-class refers to people who earn wages through manual, service, industrial, or lower-income occupations and often face greater financial insecurity despite being employed. It is best understood as a social structure—specifically, a segment of society characterised by the type of work performed and the associated economic status, shaping both individual and collective experiences within broader societal systems.

Themes: Economic roles and social stratification. 
The working-class is central to the theme of economic roles, as it highlights the division of labour and the distribution of resources within society. It also exemplifies social stratification, illustrating how economic and occupational factors contribute to the formation of distinct social groups and influence access to opportunities and stability.

Nuance: Persistent financial precarity. 
What distinguishes the working-class within its category is the persistent financial precarity faced by its members. Despite being employed, individuals in this group often experience limited upward mobility, job insecurity, and vulnerability to economic shifts, setting them apart from other social strata.