Ants organize their colonies through a complex system of communication, cooperation, and division of labor. They use pheromones to communicate with each other, leaving trails to food sources or marking areas that need to be defended. Different ants have specific roles within the colony, such as workers, soldiers, and the queen. The queen is responsible for reproduction, while workers gather food, care for the young, and maintain the nest. This division of labor helps the colony function efficiently and thrive.