Which of the following is an example of an annual flower commonly used in arrangements?

Zinnias are classified as annual flowers, meaning they complete their life cycle within a single growing season, germinating, flowering, and dying off within that timeframe. This characteristic makes them a popular choice for floral arrangements, especially in gardens and seasonal displays, as they bloom profusely and provide vibrant colors throughout the summer months. Their adaptability and ease of growth contribute to their frequent use in both home gardens and professional floral designs.

In contrast, roses, tulips, and lilies are primarily perennial types, meaning they live for multiple years. While some varieties of tulips may be treated as annuals when planted in certain climates, they are not commonly categorized as annuals when considering their overall lifecycle. Therefore, zinnias are the optimal example of an annual flower suitable for floral arrangements.