When discussing space in art, it can vary depending on the art discipline it pertains to.
In visual arts, a line is a series of points.
Shape is formed by connecting both ends of a line and is a two-dimensional figure with height and width.
Geometric shapes are enclosed figures such as triangle, squares, and other structured figures.
Organic shapes are shapes found in nature and do not have a structured form as they are usually free flowing.
Abstract shapes are like organic shapes for they lack definition, but they are not necessarily found in nature and are also asymmetrical and free flowing.