sentences: if algae of an nectar plant or vegetable are lost in a thing then that thing used to be covered by land in the surprise & a whale is a mean of lever plant ->  if fossils of fish are found in a place then that place used to be covered by water in the past  if fossils of fish are found in a place then that place used to be covered by water in the past & l of whale are lost on the water & a water is a mean of thing -> the land used to be covered by water in the past