The correct answer is Four: income, welfare, minimum needs, and capabilities approaches. Explanation & Key Takeaways: • The Income Approach is one of the oldest methods used to measure human development. It links the level of development directly to income, under the assumption that higher income reflects a higher level of human development and greater freedom. Hence, statement 1 is incorrect as it includes participatory and rights-based approaches which are not part of the four "main" traditional classifications. • The Welfare Approach views human beings as beneficiaries or targets of all development activities. This approach argues for higher government expenditure on education, health, and other social sectors to improve the quality of life. Hence, statement 2 is incorrect. • The Basic Needs Approach was initially proposed by the International Labour Organisation (ILO). It identifies six basic needs: health, education, food, water supply, sanitation, and housing. This approach ignores the question of human choices and focuses primarily on the provision of these necessities. Hence, statement 3 is incorrect. • The Capability Approach is closely associated with the work of Prof. Amartya Sen, the Indian Nobel Laureate. It focuses on building human capabilities in the areas of health, education, and access to resources as the key to increasing human development. Hence, statement 4 is correct. • Collectively, these four methods represent the primary framework through which human development has been historically analyzed and implemented by global organizations. Related Concepts: • Concept of Human Development: The concept was introduced by Dr. Mahbub ul Haq, a Pakistani economist, in 1990. He described it as development that enlarges people's choices and improves their lives. • United Nations Development Programme (UNDP): Since 1990, the UNDP has published the Human Development Report (HDR) annually. This report provides the Human Development Index (HDI), which ranks countries based on their progress in key dimensions. • Dimensions of HDI: The index is a composite statistic of life expectancy (Health), education (Mean years of schooling and Expected years of schooling), and per capita income (Standard of living) indicators. • Amartya Sen’s Contribution: Prof. Amartya Sen emphasized that the objective of development is to increase freedom. He argued that the lack of capabilities (like illiteracy or poor health) limits the choices people can make, thereby hindering development. • Global Trends: Modern reports, such as the 2023-24 HDR, now also consider factors like planetary pressures and inequality (IHDI) to provide a more holistic view of global progress. Important Notes: • Linguistic and Cultural Factors: While not part of the "four main approaches," factors like gender empowerment and political freedom are often measured through supplementary indices like the Gender Inequality Index (GII). • Income vs. Capability: A crucial distinction in these approaches is that while the Income Approach focuses on what people have, the Capability Approach focuses on what people are capable of doing with what they have. • Government Policy: The Welfare Approach is often the basis for Social Security programs and Universal Healthcare initiatives in many countries, including India. • ILO Standards: The Basic Needs Approach remains relevant for developing nations striving to meet the Sustainable Development Goals (SDGs) set by the United Nations for 2030.