Final answer:
In the selection about dinosaur extinction, the main patterns of organization are cause-effect, with focus on the hypothesis surrounding their disappearance, and a list of items detailing various evolutionary events and species developments.
Step-by-step explanation:
The main patterns of organization of the selection that suggests not all dinosaurs became extinct are cause-effect and list of items. The hypothesis that a large extraterrestrial object impact caused the extinction of dinosaurs operates within a cause-effect framework. Scientists seek out additional data to support or refute this hypothesis, linking cause and consequence to the disappearance of the dinosaurs. Meanwhile, a list of items pattern is seen as the selection discusses various events and biological developments, such as the evolution of early birds from reptile ancestors and the emergence of new species in the Cenozoic era after the mass extinction event.
Understanding the main patterns of organization in a selection helps to grasp the provided information more effectively. These patterns are the underlying structure that helps convey the evolution of species through history, impacts of mass extinctions, and speciation events.