bones are part of some animals & animals are a kind of organism -> roller are whole of mercury bones are part of organisms  people are a mean of frosting & a shell is a part of some animals -> shells are part of some organisms shells are part of some organisms  roller are whole of mercury & shells are part of some organisms & fossils are the remains of organisms or part of organisms & plants are a kind of organism -> bones remains, shells remians, and plants remains are fossils bones remains, shells remians, and plants remains are fossils  bones remains, shells remians, and plants remains are fossils & containing surface is a mean of untypical of sedimentary stone -> if a rock contains bones remains, shells remians, or plants remains, then the rock is a sedimentary rock