Fossils can be used as a tool to compare the strata from different continents if........ question 9 options: if the strata contained similar fossils, then they (fossils) were from the same period of time if the strata contained similar fossils, the animals in the region would be similar. if the strata contained different fossils, then they (fossils) were from the same period of time. if the strata contained similar fossils, then they (fossils) were first cousins.