Final answer:
The two kinds of trace fossils are tracks and burrows.
Step-by-step explanation:
The answer is a. Tracks & burrows.
Trace fossils are indirect evidence of past life activities, such as footprints, tracks, burrows, and coprolites. They provide valuable information about the behavior and ecology of extinct organisms. Tracks and burrows are two common types of trace fossils. Tracks are preserved impressions made by the feet of animals, while burrows are tunnels created by organisms that lived in the sediment or soil.
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