What are fossils?

Fossils are primarily defined as the remains or traces of once-living organisms that have undergone a process of preservation, often turning into rock through mineralization over long periods. This process captures the biological forms of organisms, including bones, teeth, shells, and even imprints or casts of soft tissues. Fossils serve as important evidence for understanding the history of life on Earth, providing insights into evolution, species diversity, and ancient ecosystems.

The option that describes fossils correctly emphasizes their nature as remnants of long-dead organisms, highlighting their transition to stone-like structures through geological processes. Understanding fossils is crucial in fields such as paleontology and archaeology, as they provide a window into past life and environmental conditions.