[b]Wow interesting questions.
1. I would save the AVES because Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with
more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds. The fossil record indicates that birds are the last surviving group of dinosaurs, having evolved from feathered ancestors within the theropod group of saurischian dinosaurs. True birds first appeared
during the Cretaceous period, around 100 million years ago.[3] DNA-based evidence finds that birds diversified
dramatically around the time of the Cretaceous–Paleogene extinction
event that killed off all other dinosaurs.[/b]