The geometric shape among the listed options is the hula hoop. To identify a geometric shape, we need to understand that geometric shapes are characterized by their properties and attributes, including their size, angles, lines, and curves. In this case, the hula hoop is a circle, which is a common example of a two-dimensional geometric shape. The other options provided, such as the cowboy hat, oak tree, and shoe, do not possess the defining characteristics of a geometric shape.
