B. It protects the species classified as endangered
global warming and the iron core in the middle
One compound can be differentiate from other by its composition although both look same. The diamond has the chemical formula of carbon (c) as it is a repeating unit of carbon which has shining features. On the other hand zirconia is zirconium dioxide (Zr. When it is crystallized it becomes shiny as like diamond. However the look of the two are meanwhile similar the composition is totally different as well the molar mass.
Because a physical change does not change the substance's chemical properties
An example of a chemical reaction like sugar's chemical formula is C6H12O6 and if we apply heat to it and it burns it will now become just carbon ashes C