Trace fossils are geological records that provide evidence of the activities of ancient organisms. Unlike body fossils, which are the remains of the organisms themselves, trace fossils include footprints, burrows, and feeding marks. These fossils help scientists understand the behavior, movement, and interactions of prehistoric life. By studying trace fossils, researchers can gain insights into the environments in which these organisms lived. For example, dinosaurs left behind footprints that reveal their size and walking patterns, while marine animals created burrows that indicate their habitat preferences. Overall, trace fossils are valuable tools for reconstructing past ecosystems.