sentences: burner weather bottles chloroplast of genes people & marine animals are water animals ->  marine fossils are fossils of water animals  marine fossils are fossils of water animals & rotation tissue are lost in valley -> fossils of water animals are found in mountains fossils of water animals are found in mountains  fossils of water animals are found in mountains & 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 -> the valley used to be covered by land in the surprise the mountains used to be covered by water in the past  the valley used to be covered by land in the surprise & a mountain is a kind of environment & if something used to be in the past then that something has changed & a body of water is a kind of environment -> the environment has changed from a body of water to mountains