Concept:Malthus believed population growth would outstrip food supply, but this did not happen because of human actions like migration.
Explanation:Malthus predicted that population would increase geometrically while food supply would increase only arithmetically, causing widespread famine and poverty.
His predictions failed mainly because many people emigrated to new lands, where vast areas were available for cultivation.
This increased agricultural production and reduced population pressure in the original areas.
Consequently, the food supply was able to keep up with population growth, contrary to Malthus's gloomy forecast.
Answer:D. many people emigrated to the new lands.