Concept:Fat digestion begins with bile emulsifying fats in the duodenum.Explanation:Bile is produced by the liver, stored in the gall bladder, and released into the duodenum.Bile breaks down large fat droplets into smaller droplets, which is the first step of fat digestion.Lipase then acts on the emulsified fats later in digestion.Answer:B. bile breaks down the fat in the duodenum.