Complex sentence: When someone walk on snow and got his feet very cold or frozen, why shouldn't it be exposed to direct source of heat such as rubbing or fireplace? that's because his/her body cells will die... right ?
Split into simpler sentences: When someone walk on snow and got his feet very cold or frozen, why shouldn't it be exposed to direct source of heat such as rubbing it or a fireplace? That's because his/her body cells will die... right?