What are a few adaptations for Iguanodons?

Iguanodon was a four legged plant eater. Its hindlimbs were longer and stronger than its forelimbs, allowing it to stand on two feet to reach higher leaves, search for predators, and even to run faster on two legs than it could on four. It was one of the first plant eating dinosaurs to have the ability to thoroughly chew its food, which enabled it to digest tougher vegetation more effectively than other dinosaurs. The Iguanodon's cheeks kept food in its mouth while it chewed, and its keratinous beak helped it to crop off vegetation, as they had no front teeth. They also had large claws on their thumbs, which could have been used to defend themselves against predators in the case that the Iguanodon couldn't flee.