Final answer:
Late starvation occurs when the body depletes its fat reserves and starts breaking down proteins for energy. This leads to muscle wasting, atrophy, and metabolic imbalances.
Step-by-step explanation:
During late starvation, the body has depleted its fat reserves and protein becomes the primary fuel source. As a result, there is extensive breakdown of body proteins, leading to muscle wasting and atrophy. The body also starts using ketones for energy, which can lead to ketoacidosis and metabolic imbalances.