Answer: The conditions under which the organism died and the way it was buried.
Explanation :
- The type of fossil which is formed depends on the conditions under which the organism died for e.g whether he died under cold or hot conditions, along with the reason that led to his death.
- Further, the habitat of the organisms i.e. terrestrial or aquatic determines the type of fossil that will get formed.
- Another important factor is the way the organism gets buried. Some organisms get buried whole and get preserved while for others only a part maybe preserved while the rest of the body may decay depending on the burial conditions.
- Based on this we can get different types of fossils.