Which sector promotes modernisation and stable employment in the economy?

The correct option is Industrial sector.

Step-by-step Explanation:

1. Role of the Industrial Sector:
The industrial (or manufacturing) sector plays a crucial role in economic development. It transforms raw materials into finished goods using modern machinery, technology, and methods, which drives technological innovation and overall economic modernisation.

2. Promotion of Stable Employment:
Unlike the primary (agriculture) sector, which is often subject to seasonal fluctuations and weather dependence, the industrial sector provides year-round, structured, and regular employment. This ensures higher job security and stable income levels for workers.

3. Support to Other Sectors:
Industries produce essential capital goods, tools, and machinery used by agriculture and service sectors, further accelerating modernization across the entire economy.

Therefore, the Industrial sector is key to promoting modernisation and stable employment in the economy.