Final answer:
The optimal foraging theory in biology analyzes how animals acquire food to maximize energy gain while minimizing energy expenditure.
Step-by-step explanation:
The 'optimal foraging theory' is a concept in biology that examines how animals acquire food in order to maximize energy gain while minimizing energy expenditure. It suggests that animals will make foraging decisions based on the balance between the caloric value of the food they consume and the energy they expend to obtain it. For example, an animal may choose to pursue prey that offers a high caloric reward while avoiding prey that requires too much energy to capture.