In which situation will food and nutrition planning become more necessary in population change?

Correct answer: When a high birth rate rapidly increases the child population

Direct answer: A is correct. A high birth rate can increase the number of children in a population, especially when many births occur over a relatively short period. Children need adequate food, balanced nutrition, healthcare, immunisation, and growth support. Therefore, planners may need to expand food programmes, school meals, maternal and child services, and other forms of nutritional support. Option A is correct because rapid growth in the child population increases the number of people whose nutritional needs must be planned for. Option B is wrong because no births would not create a rapidly growing child population. Option C is less suitable because it describes a declining population with sufficient services, so it does not identify an increased planning pressure. Option D is wrong because a stable population with no migration does not by itself create a new food and nutrition burden. The exact need also depends on existing resources and the health of children, but the demographic pressure in the question is clearly the rise in child numbers. Memory cue: more children require more planned food, nutrition, and care.