The answer is: [A]: "phylochips" .
____________________________________
If<span> the </span>original<span> organism decays, leaving an imprint and an empty </span>space<span>, it is </span>called<span>an exterior mold or simply a mold. </span>If a space in the structure is filled with minerals and then the original animal or plant part dissolves<span>, it is </span>called<span> a cast.</span>
