Final answer:
Stegosaurs were herbivores that exclusively ate plants, using their peg-like teeth to consume prehistoric vegetation and not meat or insects.
Step-by-step explanation:
Stegosaurs ate plants. This makes them herbivores, similar to other plant-eating dinosaurs of their era. Unlike carnivores like the lion or insectivorous animals such as the ladybug, stegosaurs did not consume meat or insects. Throughout the Mesozoic Era, many dinosaurs, including stegosaurs, had specialized diets adapting to their environments.
Stegosaurus, with its peg-like teeth and a digestive system capable of processing tough plant material, thrived on prehistoric vegetation. Thus, spanning millions of years, the staple diet of stegosaurs was entirely plant-based, aligning with the broader ecological roles of dinosaurs within their respective habitats.