A shared derived characteristics is usually a homologous structure, such as a backbone, that is shared by all organisms in a group.
Its b because it explains it better than a waterfall does
<span>"Chemical weathering and physical weathering" would be the correct answer
Chemical weathering breaks down the bonds holding the rocks together, and the physical weathering will crush and break them apart.</span>
The answer could be a satellite
Phosphorous has 5 valence electrons and so gaining 3 electrons will make it isoelectronic with the stable noble gas argon, and will produce the P3- ion
