एडिमा (Edema), जो ऊतकों में द्रव के संचय और सूजन द्वारा पहचाना जाता है, शरीर के किस तंत्र में खराबी या रुकावट से सबसे सीधे तौर पर संबंधित है?

Given below are two statements: one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): Protein intake must be strictly restricted during the early non-dialysis stages of acute kidney failure. Reason (R): The metabolism of proteins produces nitrogenous waste products like urea, which significantly increases the workload on failing kidneys. In light of the above statements, choose the most appropriate answer:

A patient exhibits severe muscle fatigue during fasting despite normal glycogen stores. Biochemical analysis reveals defective transport of long-chain fatty acids into mitochondria. Which metabolic consequence best explains these symptoms?