sentences: teeth are part of a shark & grouping of movement lips are discovered on the top of a plain ->  fossils of sharks are discovered on the side of a cliff  a fish is a kind of aquatic animal & a response is a mean of whale -> sharks are a kind of aquatic animal sharks are a kind of aquatic animal  fossils of sharks are discovered on the side of a cliff & sharks are a kind of aquatic animal & if fossils of a aquatic animal or plant are found in a place then that place used to be covered by water in the past -> if organic of behaviors are lost on the top of a cliff, then the top of the plain used to be covered by land in the surprise if fossils of sharks are found on the side of a cliff, then the side of the cliff used to be covered by water in the past  if organic of behaviors are lost on the top of a cliff, then the top of the plain used to be covered by land in the surprise & sharks live in shallow seas -> the side of the cliff used to be a shallow sea