Correct Option
The correct option is Increasing the physical land area of the country.
Explanation
Human capital refers to the stock of knowledge, skills, education, health, and expertise embodied in a nation's population. Investment in human capital transforms human resources into productive assets. Economic growth theories posit that human capital contributes to growth by improving the quality of labor and the efficiency of production, rather than by increasing the quantity of fixed natural resources.
Option Analysis
- Increasing labour productivity. Investment in education and health directly enhances the physical and mental capabilities of the workforce. A healthier and more skilled worker produces more output in the same amount of time. This is a fundamental mechanism of economic growth.
- Stimulating innovations. Stimulating innovations: A highly educated workforce is essential for Research and Development (R&D). Human capital provides the intellectual foundation required to generate new ideas, products, and processes, which drives technological progress and economic expansion.
- Increasing the physical land area of the country. Increasing the physical land area of the country: Land is a natural factor of production with a geographically fixed supply. While human capital (through technology) can increase the productivity or yield of the land, it cannot physically expand the sovereign territory or landmass of a country. Therefore, this is not a mechanism of human capital investment.
- Facilitating adaptation of new technologies. Facilitating adaptation of new technologies: Educated individuals possess higher "absorptive capacity." They can understand, operate, and adapt to new and complex technologies faster than an uneducated workforce, thereby accelerating the diffusion of technology across the economy.
Key Takeaway: Human capital formation drives economic growth by enhancing the efficiency and innovative capacity of the workforce, but it cannot alter fixed geographical endowments such as the physical land area.