b. 795 million
Hunger refers to the periods when people are experiencing severe food insecurity, that is, they do not eat food for days at a go due to lack of money, lack of access to food or other important resources, as stated by the UN's Hunger Report.
Usually we associate the term hunger with lack of food. The threshold for undernourishment happens to be 1800 calories a day. Undernutrition may not just be because of lack of calories, but also because of the deficiency in energy protein or vitamins or other essential minerals.
Food security crisis can be sometimes because of food unavailability or no access to it.
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