Animals communicate danger to their young in various ways, including vocalizations, body language, and pheromones. For example, some animals use specific calls or alarms to warn their young of approaching predators, while others may exhibit certain behaviors to signal danger, such as gathering their young close or leading them to safety. Additionally, some animals release pheromones that signal danger, prompting their young to take evasive action. Overall, animals have developed intricate ways to communicate and protect their young from potential threats in their environment.