Final answer:
A circle symbolizes perfection, eternal nature, unity, inclusiveness, and harmony. It is often used to represent the eternal bond of marriage.
Step-by-step explanation:
A circle symbolizes perfection and eternal nature. In ancient Roman architecture, the circle had spiritual associations as it represented the perfection and eternal nature of God. It also symbolizes unity and inclusiveness as all points on the circumference of a circle are equidistant from the center. For example, a wedding ring is often in the shape of a circle, symbolizing the eternal bond of marriage. The circle is also used in art to convey a sense of harmony and balance.