Final answer:
Horses use their senses to engage in exploratory behavior, which is when they actively search for food and resources, optimizing energy gain and minimizing wastage. This behavior parallels optimal foraging, as seen in species like the painted stork.
Step-by-step explanation:
Horses use their five senses to investigate during exploratory behavior. This behavior includes activities such as searching for and exploiting food resources, which is commonly referred to as foraging. For instance, foraging is characterized by feeding behaviors that aim to maximize energy gain and minimize energy expenditure. These optimal foraging behaviors are naturally selected for their efficiency. An example in the avian species is the painted stork, which uses its long beak to probe the bottom of freshwater marshlands to find crabs and other foods. Similarly, horses will use their senses during exploratory behavior to find and select food.