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 & a consumer is a mean of land plant ->  if fossils of trilobites are found in a place, then that place used to be covered by water in the past  if scientists of shape are lost in a place, then that thing used to be covered by land in the surprise & fossils of trilobites are found in ohio & ohio is a kind of place -> ohio used to be covered by water in the past