Respuesta :
In a harsh environment — it's snowing, say — you have 3 hours to survive without shelter. After 3 days, you need water or you'll perish. You can make it 3 weeks without food, though we promise you that won't be fun.
After 3 days, you need water or you'll perish. You can make it 3 weeks without food, though I promise you that won't be fun.