- Economic theories of balanced growth often refer to proportional development across different sectors of the economy (e.g., industry and agriculture) or proportional growth of factors like capital and labor. - However, in a broader sense, "balanced growth" can imply achieving growth that is sustainable and equitable. - Option A suggests balancing economic expansion (income, output) with environmental considerations (natural resources), hinting at a sustainable growth path where resource depletion doesn't outpace resource replenishment or efficiency gains.