If fossils of a water animal or plant are found in a place then that place used to be covered by water in the past, and fossils are the remains of prehistoric life. Given these facts, what being found in a place shows that place used to be covered by water among the following options:
- volcanoes
 - wind
 - plankton and nonliving organic
 - dead organisms
 - marshes and swamps
 - sedimentary rocks
 - dirt
 - remains of prehistoric life


 

        remains of prehistoric life 