Final answer:
The breakdown of fat in Type 1 DM leads to metabolic acidosis due to the production of ketone bodies.
Step-by-step explanation:
The breakdown of fat in Type 1 DM leads to a condition called diabetic ketoacidosis, which results in metabolic acidosis. When glucose is not available for energy, the body breaks down fatty acids, leading to the production of ketone bodies. These ketone bodies increase the acidity of the blood, causing metabolic acidosis.