The question asks for the specific term describing the movement of workers away from the agriculture sector towards industry and services. Let's analyze the options:
Industrialization refers primarily to the development of industries in a country or region, involving increased manufacturing and machine production. While a shift of workers towards industry is a key part of industrialization, this term doesn't encompass the simultaneous shift towards the services sector, which is also mentioned in the question.
Urbanization is the process where an increasing percentage of a population lives in cities and suburbs. This trend is often linked to people moving from rural agricultural areas to urban centers for work in factories (industry) or service jobs. However, urbanization focuses on the population's location (rural to urban) rather than the specific change in job types or sectors people are moving into.
Occupational diversification directly describes the change in the types of jobs or occupations available and pursued by the workforce. It signifies a move away from reliance on a single primary sector (like agriculture) towards a broader range of employment opportunities in sectors such as industry and services. This perfectly matches the description in the question.
Economic transition is a broad term that can describe significant changes in an economy's structure, such as moving from a centrally planned economy to a market economy, or changes related to development stages. While the shift from agriculture to industry and services is a component of broader economic transition, it's not the most precise term for the workforce's sectoral shift itself.
Based on the analysis, the most accurate and specific term for the shift of workers from agriculture to industry and services is occupational diversification. This term precisely captures the changing nature and distribution of jobs within the economy as it develops beyond a purely agrarian base.