冷蔵庫

How it works

に (in) marks the location (部屋(へや) (room)) where something exists. は (topic) raises 冷蔵庫(れいぞうこ) (refrigerator) as the topic — “as for a fridge…”. The verb ある (there is) becomes polite あります (there is, polite), and the final か (question) turns it into a polite question.