Mosquito is to malaria as fasting is to what?

The relationship between "mosquito" and "malaria" is based on causation; mosquitoes are vectors that transmit the malaria parasite, leading to the disease. Similarly, "fasting" is directly related to "hunger," as fasting typically results in the sensation of hunger due to the lack of food intake.

In this context, hunger is the condition that arises from the act of fasting, just as malaria is a disease caused by the presence of the malaria parasite brought on by mosquitoes. This connection makes hunger the most fitting answer as it reflects the cause-and-effect relationship evident in the first pair. Other options like running, fatigue, and despair do not correctly capture the direct outcome or result of fasting in the same way that hunger does.