Final answer:
The distinctive evolutionary novelties of Ankylosauria include extensive body armor, low skulls, and the closure of fenestrae, which are all adaptations that enhanced their survivability.
Step-by-step explanation:
The many distinctive evolutionary novelties of the Ankylosauria include extensive body armor, low skulls, and closure of fenestrae. Ankylosaurs were a group of dinosaurs known for their heavy armor made up of osteoderms (bony plates), which acted as protection.
Their skulls were broad and low, providing a stable platform for supporting this armor. The closure of the temporal fenestrae (skull openings) in their lineage represents an evolutionary development related to strengthening the skull against forces encountered during their feeding or defensive behaviors. All these features represented adaptations to their environment that enhanced their survivability.