Final answer:
Fossils are the preserved remains or traces of organisms from the past, which include bones, teeth, and in rare cases soft tissues, preserved under special conditions.
Step-by-step explanation:
The remains of a living organism that have been preserved in a variety of contexts for many years are called fossils. Fossils are the preserved remains or traces of organisms that have lived in the past. They provide a historical record for the existence of prehistoric life, which can include bones, teeth, shells, impressions, or even soft tissues in rare cases.
For an organism to be preserved as a fossil, it must be covered quickly by sediments or be in an environment that prevents decomposition. This could include being trapped in substances like amber, tar, or being frozen in glaciers. Although soft tissues are rarely preserved due to rapid decomposition after death, certain conditions such as rapid burial in an oxygen-free, low-energy sedimentary environment can lead to their preservation.
Some of the most fascinating examples of fossils include skeletal remains, footprints, burrows, and organic residues that have survived for thousands or even millions of years. These fossils are instrumental in helping scientists understand the history of life on Earth.