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Continental crust is thicker and less dense than oceanic crust

Explanation:

Oceanic crust is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite. The low density of continental crust causes it to “float” high atop the viscous mantle.

Source: https://www.whoi.edu/oceanus/feature/unraveling-the-tapestry-of-ocean-crust/

the answer to your question is b

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.