Which example represents a specific fossil?

The example of T. roseae is recognized as a specific fossil because it refers to a particular species of dinosaur, specifically a theropod from the Ceratopsia group. When fossils are assigned species names, like T. roseae, they provide specific information about the organism, including details of its morphology, classification, and evolutionary relationships.

In contrast, the other examples given are more general representations or wider categories. Archaeopteryx, while it is a significant fossil, refers to a genus that includes several species and is often used as a transitional fossil between dinosaurs and birds. Stegosaurus, similarly, denotes a genus that encompasses multiple species known for their distinctive dorsal plates and tail spikes. The Dodo bird, while it does refer to a specific extinct bird, is not typically categorized as a fossil; it represents a more recent extinction related to human activity, with less emphasis placed on its fossil record compared to older forms where findings lead to the description of distinct species like T. roseae.

Thus, T. roseae stands out as a specific fossil that provides a unique identification within the scientific understanding of prehistoric life.