In which situation can high density put greater pressure on the food-supply system?

Correct answer: When local production is low and consumer demand is high

Answer: A, when local production is low and consumer demand is high. High population density means many people live within a relatively small area, so the local demand for food can be large and concentrated. If local farms, storage facilities, transport links, markets and distribution networks cannot provide enough food, the system may face shortages, rising prices, delays or unequal access. A is correct because it combines strong demand with weak local supply, the condition most likely to create pressure. B is wrong because sufficient production and distribution reduce pressure, even when density is high. C is wrong because no consumers would mean no consumer demand. D is wrong because food demand does not end simply because density is high. Density alone does not guarantee a shortage; trade, transport and good management can support dense populations. Memory cue: pressure grows when demand rises faster than reliable supply.