For the vast majority of obese people the cause lies in overeating - especially where it concerns high-fat and -sugar foods - and the cure in eating less and to a certain (but lesser) extent getting more physical exercise. There are people for whom this does not hold as they gain weight due to other reasons - thyroid problems, Prader-Willi syndrome, Cushings syndrome, 'side effects' of medication they take for other conditions and more - but these are the exceptions to the rule.
Famine doesn't mean the absence of food. There is often plenty, but the food is inadequate. The skeletal children are often basically propaganda, they refuse to show the real ones. They look fat, and they fear they wouldn't get anything. I believe it is the same thing. The signs are the same.
