Hunger is physical , when you need to eat. Famine is a shortage of food. Starvation is when you are dying from a lack of food.

I'm not american but the hunger is when you are hungry, you want to eat because you feel hunger; starvation and famine are very similar they mean a situation : for example in a country, when people can't no longer eat when they want, so their country is stoken by a famine or starvation. to sum it up somebody can feel hunger, and a country is stroken by a famine or starvation. hope that helps

Candice is entirely correct. We would never use famine in america unless there was an actual shortage of food for the entire country. Normally we would use "Hungry", but if we wanted to drastically emphasize how hungry we are then we say we are "starving" even though we're not actually dying from a lack of food.

Yes, the only thing I would add is that 'famine' refers to a widespread state of nutrient deficiency, as perhaps defined by a country or region.