Given below is a sentence in which four words are

Solution

A-D  and  B-C does not makes any sense. A - Heavy metal: Refers to a dense and metallic element or substance. B - Earth's: Refers to the planet Earth and indicates possession or association with Earth. C - Crucible: A container or vessel used for melting and processing materials at high temperatures, often associated with metallurgy and chemical processes. D - Supernova: A powerful and explosive event that occurs at the end of a massive star's life cycle, leading to the ejection of outer layers and the production of heavy elements through nuclear fusion. Hence the correct sentence is The heavy metal (A) found in earth's (B) crust was created in the crucible (C) of a supernova (D) aeons ago.