Final answer:
Calcium (Ca) is the element most likely to be shiny among the given options.
Step-by-step explanation:
The element that is most likely to be shiny among the given options is calcium (Ca).
Calcium is a silvery-white metal that is highly reactive with water and air. It has a shiny appearance and is often used in alloys and in the production of building materials.
In contrast, sulfur (S), boron (B), and fluorine (F) are non-metallic elements that do not normally exhibit a shiny appearance.
Learn more about Shiny elements