What type of herbicide would be more appropriate for controlling weeds in a park?

A selective herbicide is the most appropriate choice for controlling weeds in a park because it targets specific types of plants while leaving desired plants, such as grass or flowers, unharmed. This is particularly important in a park environment where maintaining the aesthetic and health of ornamental plants and turf is crucial for public enjoyment. Selective herbicides allow for effective weed control while preserving the biodiversity and beauty of the landscape, ensuring that the park remains attractive and functional.

In contrast, non-selective herbicides would kill almost all plants they come in contact with, which could result in significant damage to desirable vegetation in the park. Residual herbicides, which remain in the soil and continue to affect plants over time, can also pose a risk to desirable plants and the overall ecosystem of the park. Systemic herbicides work by being absorbed and translocating throughout the plant to attack it from within, which may or may not be suitable depending on the weed species and the presence of desirable plants nearby. Thus, selective herbicides provide a focused and safe solution for managing weeds in park settings.