Concept:Manufacturing industries in Tropical Africa are limited mainly by shortages of productive inputs rather than by market or labour issues.
Explanation:Raw materials needed by these industries are often scarce, poorly developed, or imported at high cost.
Local supply is usually inadequate and unreliable for steady factory production.
High demand for manufactured goods is actually a benefit, not a problem.
Industrial labour in Tropical Africa is mostly unskilled or semi-skilled and is neither high quality nor expensive.
Therefore, labour cost is generally low and does not pose a major difficulty.
Answer:B. inadequate raw materials