Fact 1: 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.

Fact 2: Fossils are the remains of prehistoric life.

Given the two facts above, answer the question "What being found in a place shows that place used to be covered by water?" with 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 