Question

an animal dies in mud, decomposes, and leaves an imprint, which is later filled by sediment to form a solid copy of the original organism. how is this fossil different from fossils of preserved remains? only hard tissue is preserved. hard and soft tissues are preserved. only soft tissue is preserved. there is little change to the preserved organism.

Explanation:

In the described fossil - formation process, the original organism decomposes and leaves an imprint which is filled with sediment. Soft tissues decompose easily, while hard tissues like bones and shells are more likely to be preserved. So, in this type of fossil, only hard tissue is preserved.

Answer:

Only hard tissue is preserved.