Final answer:
Trace fossils are indirect fossils that show the activity and behavior of organisms in the past.
Step-by-step explanation:
Indirect fossils such as traces of worm trails, footprints, and tunneling burrows are known as trace fossils. These fossils provide evidence of the activity and behavior of organisms that lived in the past. They do not represent the actual remains of the organisms, but rather the traces they left behind. Examples of trace fossils include dinosaur footprints, fossilized worm burrows, and petrified tree trunks.
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