Final answer:
In floral design, the most important principle for designing a casket spray is symmetry. Symmetrical balance creates visual stability and is characterized by an exact or nearly exact design on either side of the horizontal or vertical axis. It is dominated by a central anchoring element.
Step-by-step explanation:
Symmetrical balance is the most visually stable and characterized by an exact or nearly exact compositional design on either (or both) sides of the horizontal or vertical axis. It is dominated by a central anchoring element. An example of symmetry in the natural world is the Moon Jellyfish, which has absolute symmetry in its design.
Balance is an even use of elements throughout a work of art, and symmetry is a formal type of balance that consists of a mirroring of portions of an image. Bilateral symmetry is the most common type, in which two halves of a work of art mirror each other. This gives the artwork a sense of balance, calmness, stability, and formality.
Emphasis is another principle of art and can be used to create a focal point. It can be achieved through color, unity, balance, or other elements. Artists use emphasis to make certain parts of the artwork stand out and become the center of attention.