What factor is NOT typically involved in landscape design?

In landscape design, it is essential to create spaces that are visually appealing and functional, as well as to consider the environmental impacts of the choices made. Random plant selection without a cohesive theme goes against the fundamental principles of landscape design, which strives for harmony and intentionality. Effective landscape design relies on a coherent arrangement of elements that reflect a specific theme or style, ensuring that various components work together rather than creating disarray. This cohesiveness enhances not only the aesthetic pleasure of the design but also its functionality and sustainability. Therefore, the option of random plant selection does not align with the structured and thoughtful approach required in professional landscape design.