Answer:
Step-by-step explanation:
When an artist observes the way light falls on a flower vase, they are primarily considering the element of shading in drawing. Shading refers to the use of varying tones or values to depict the way light interacts with objects, creating areas of light and shadow. By observing the play of light and shadow on the flower vase, the artist can understand the form, volume, and three-dimensional aspects of the object. This helps them create a more realistic and visually engaging representation of the vase in their drawing.