The model that shows an element is Model 1. Option A
Elements are the simplest substances that cannot be broken down further by chemical means, while molecules are combinations of two or more atoms, which can include atoms of the same or different elements, chemically bonded together. Molecules can be composed of elements or a combination of elements.
Model 1 has atoms of the same element that are joined together to form the molecule of the element according to the image that we have here.