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Malnutrition always means a lack of food and not enough calories.

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In “Malnutrition happens when people lack nutrients, vitamins and minerals” (line 6), “lack” can be replaced, without changing its meaning, by have insufficient.

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Based on the text, malnutrition means a disorder of food digestion.

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The undernourishment is limited to some developing countries.

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Iron deficiency can make children less active and not able to concentrate.

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Africa is an example of developed country.

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An antonym for the word “unavailability” (line 16) is dearth.

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In “They do not have the money to afford imported food” (lines 17 and 18), “to afford” can be correctly replaced by to withdraw.

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Eating disorders are the main cause of child mortality.

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The word “thus”, in “many mothers do not breastfeed their children, thus weakening the immune system” (line 22), can, without changing its meaning, be replaced for thereby.