Q: What is the term for something left behind by once-living organisms?


Read this paragraph and choose the correct option from the provided answers:

Most sedimentary rocks form from sediments. Sediments are small pieces of other rocks, like pebbles, sand, silt, and clay. Sedimentary rocks may include fossils. Fossils are materials left behind by once-living organisms. Fossils can be pieces of the organism, like bones. They can also be traces of the organism, like footprints.

 Choices:

- decay

- waste matter

- deposits

- fossils


A:
fossils