Question: The movie "A Bug's Life" by Disney/Pixar starts with an ant colony harvesting for food. But instead of harvesting food for the colony, the ants were harvesting for the grasshoppers, who obliged them to do so. The long line of ants carrying food is stopped when a leaf falls down on their way, more precisely on their trail. The ants in front of the line just interrupted by the leaf start despairing, claiming they do not know what to do; that is, where to go. Another ‘more instructed' ant suggests that they might walk around the leaf thus keeping their harvesting. One ant even claims that such catastrophe was not nearly as bad as the "twig of 93". Based upon this brief summary of the beginning of the movie "A Bug's Life", what can you infer about the way ants forage and harvest food, more specifically, why did the ants loose their direction when the leaf fell in their trail?