The question asks to identify an intervention that is part of rural development programmes. Let's analyze the options provided:

Understanding Rural Development Interventions

Rural development programmes aim to improve the quality of life and economic well-being of people living in rural areas. These programmes typically focus on infrastructure, agriculture, health, education, and social services specific to the needs of the countryside.

Evaluating Development Options

• Expanding metro rail: This is primarily an urban development initiative, focused on improving transportation within cities.
• Building skyscrapers: This relates to urban infrastructure and commercial/residential development in cities, not rural areas.
• Providing road connectivity to unconnected villages: This directly addresses a common need in rural areas, improving access to markets, healthcare, education, and other essential services. It is a classic example of a rural infrastructure project aimed at boosting economic activity and social integration.
• Developing urban airports: This is an infrastructure project focused on air travel, typically serving urban centers and their surrounding regions.

Conclusion on Rural Development

Based on the analysis, providing road connectivity to unconnected villages is a direct intervention designed to foster rural development by improving essential infrastructure and accessibility, which are critical for the progress of rural communities.