Sa saltasaurus hzoom
Saltasaurus was a large sauropod that lived in South America during the Cretaceous period.  Like all sauropods they lived in herds where they have protection from large predators such as Carnotaurus.  Large predators would attack the young and avoid the adults but they would use there weight to crush a predator by rearing up on its back legs.  It was covered in bony armour witch protects them also from large predators.