Explanation:

- Manures: These are organic materials added to soil to enhance fertility. They originate usually from animal dung or plant residues.

- Moulds: Refers to a type of fungus or also the hollow impression left in a substrate where an organism once was, relevant in fossilization too, but not the remains themselves.

- Fossils: The correct answer. These are the preserved remnants or traces of organisms (plants or animals) that lived in the past, typically found in sedimentary rock layers.

- Remnants: This term refers to remaining pieces or fragments of something, but is more general and not specifically related to geological preservation.