A) Vibrations
Sounds vibrate the eardrum
Sedimentary rocks form when sediments come together and forms the rocks, while metamorphic rock are those formed when sedimentary and igneous rocks compress under great heat and pressure.
there is less energy on the 5th level, the less the energy, the smaller the food chain
It means they may or may not have the same function but have similar structure depicting that the organisms may have had a common ancestor.