Dinosaurs lived millions of years ago. What did they eat? Did they buy bags of dinosuar food? No, they didn't. Millions of years ago, there were no people or stores. How do scientists study dinosuar food? They study dinosuar teeth.
Most dinosuars had large, flat teeth. They ate plants. Some dinosuars had long, sharp teeth. They ate meat.
We have flat teeth and sharp teeth so we can eat plants and meat. A few dinosuars had flat teeth and sharp teeth, too. These dinosuars ate both plants and meat, just like us!