What are four types of fossils that can give indirect evidence?

Four types of fossils that provide indirect evidence include trace fossils, which show the activity of organisms (like footprints or burrows); coprolites, which are fossilized feces that reveal dietary habits; gastroliths, which are stones ingested by some dinosaurs to aid digestion; and biofossils, which represent the remains of once-living organisms and can indicate the environmental conditions of their habitats. These fossils help scientists infer behaviors, diets, and ecological interactions of past life forms.