Step 1: Understanding the Question:
The question asks to identify the type of economies for which labour-intensive production techniques are most suitable.
Step 2: Key Concept:
A labour-intensive technique is a method of production that uses a higher proportion of human labour relative to capital (machinery and technology). The suitability of a technique depends on the factor endowments of an economy, i.e., the relative abundance of its factors of production (labour and capital).
Step 3: Detailed Explanation:
- Developing countries and backward economies are typically characterized by a large population and an abundance of labour. Capital, on the other hand, is often scarce and expensive.
- Using labour-intensive techniques in such economies is beneficial because it helps in utilizing the abundant labour force, which in turn generates employment and reduces unemployment. It is a cost-effective method when labour is cheap.
- Developed countries are generally capital-abundant and have higher labour costs. Therefore, they tend to favour capital-intensive techniques to maximize efficiency and reduce costs.
- Both (A) and (C) are technically correct, but 'Developing countries' is the more standard and encompassing term used in modern economics.
Step 4: Final Answer
Based on the principle of factor endowment, labour-intensive techniques are most useful for developing countries that have an abundance of labour and a scarcity of capital.