Answer:the decreased pressure on the food supply reduces starvation and misery or the decrease demand on limited resources reduces starvation and poverty.
Explanation:
The natural decrease of population that occurs when there are natural disasters according to Malthus is a great advantage in reducing a demand that an ever increasing population puts on limited resources.
Malthus calls this a positive check because he believes we need some sort of intervention if we don't want to face a situation whereby we will end up outstripping the available resources or face a situation where the available resources can't meet our needs or can't cover the available number of population.
