A fleeing duck exhibits a behavior that shows it is typically reluctant to fly into trees or brush. This caution stems from the instinctual need to avoid obstacles that could lead to injury or entrapment. Ducks, when startled or escaping a predator, tend to prefer open paths where they have a clear view of their surroundings, allowing them to navigate more safely. Their natural flight pattern often involves flying over obstacles rather than into them, as flying into densely packed trees or brush can pose a significant risk of collision, which could be dangerous.
In contrast, other behaviors noted in the incorrect options suggest actions that are less characteristic of a fleeing duck. For instance, flying directly into trees or ignoring obstacles doesn't align with how these birds typically react under stress. A fleeing duck is more likely to prioritize safe escape routes that maximize its chances of survival. Additionally, the idea of trying to hide under bushes, while instinctive to some degree, is not as common as simply flying away from danger.