Final answer:
Starvation occurs when the body's fat reserves are completely exhausted and protein is the only fuel source available. Temporary hunger is a normal physiological response to not eating for a certain period of time. Famine is a severe and prolonged shortage of food in a specific region or country.
Step-by-step explanation:
Starvation occurs when the body's fat reserves are completely exhausted and protein is the only fuel source available to the body. This leads to significant loss of fat and muscle mass, fatigue, and a weakened immune system. Temporary hunger is a normal physiological response to not eating for a certain period of time, such as overnight fasting. It can cause symptoms like irritability and hyperactivity, but is relieved once food is consumed. Famine is a severe and prolonged shortage of food in a specific region or country, resulting in widespread hunger, malnutrition, and even death. It is usually caused by factors like crop failure, political instability, or economic issues.