Which of the following plants is related to the genus Verbena?

The correct answer reflects that Veronica sp. belongs to the family Plantaginaceae, which is closely related to the genus Verbena, both of which are part of the broader order Lamiales. Plants in this family often share similar features such as flowering structures and growth habits. This connection highlights an important aspect of plant taxonomy, illustrating how different genera can share family relations, indicating possible common characteristics in their ecological traits or overall plant structure.

In contrast, the other plants listed belong to different families and orders: Yucca sp. is part of the Asparagaceae family, which includes succulent and ornamental plants; Sedum sp. belongs to the Crassulaceae family, known for its drought-resistant succulents; and Thymus sp. is part of the Lamiaceae family, which is related but not to Verbena specifically. Understanding these relationships can be crucial for horticultural practices, plant selection, and landscape design.