Economic Development Trends

Steps:

• Recall that development involves economic growth, improving living standards and infrastructure.
• Examine each choice: income rises with productivity; household size shrinks due to urbanization; mortality drops with healthcare; food spending falls as incomes grow.
• Identify the trend that consistently increases: higher GDP per capita boosts household earnings.
• Confirm via development models like Rostow's stages, where advanced economies show rising incomes.

Why A is correct:

• Development raises GDP per capita, directly increasing average household income through better jobs and wages.

Why the others are wrong:

• B: Average household size decreases as families urbanize and have fewer children.
• C: Infant mortality rate falls with improved healthcare and sanitation.
• D: The proportion of income spent on food declines per Engel's Law as incomes rise.

Final answer: A