sentence2_structure: The presence of an animal fossil in a rock<>gives<>evidence of the time period$$$the animal<>lived<>in
sentence1: Fossils give us evidence about the plants and animals that lived long ago, and the nature of the environment at that time.
sentence2: The presence of an animal fossil in a rock gives evidence of the time period the animal lived in.
question: The presence of an animal fossil in a rock gives evidence of