Answer:
3: Fossils.
Step-by-step explanation:
The correct answer is 3: Fossils.
- Vestigial structures are body parts that are no longer used for their original function.
- Sedimentary rock is formed from the accumulation of sediments, such as sand, mud, and pebbles.
- Amino acid sequences are the building blocks of proteins.
Petrified bones, imprints of leaves or footprints, and insects preserved in tree sap are all examples of fossils. Fossils are the preserved remains or traces of organisms that lived in the past. They can provide information about the evolution of life on Earth, as well as the environment in which these organisms lived.