What was the horn used for on a parasaurolophus?

The horn of a parasaurolophus, a herbivorous dinosaur from the Late Cretaceous period, is believed to have served multiple purposes. Primarily, it may have been used for communication, helping to produce sounds that could be heard over long distances, similar to modern-day animals. Additionally, the horn could have played a role in mating displays or social interactions, showcasing the fitness of individuals to potential mates. Lastly, it may have also provided some defense against predators.