I NEED THIS ANSWERED ASAP
This fossil shows tunnels left after animals burrowed through the sediment. Which statement best describes this fossil?
1. It is mold because it shows empty spaces in the organisms' shapes.
2. It is a cast because it shows empty spaces in the organisms' shapes.
3. It is a trace because it shows evidence of animal activity.
4. It is an imprint because it shows evidence of animal activity.