Which characteristic best describes noxious weeds?

Noxious weeds are characterized by their potential to cause harm or destruction to agricultural crops, natural ecosystems, and habitats. They often outcompete native species for resources, disrupt local ecosystems, and can lead to significant economic losses for farmers due to their invasive nature. The primary concern with noxious weeds is their ability to spread rapidly and dominate areas, making them difficult to control and manage.

While options A, B, and D suggest positive attributes—such as medicinal properties, contributions to biodiversity, or enhanced crop yields—none of these reflect the true nature of noxious weeds. Instead, noxious weeds typically have a negative impact on agriculture and the environment, solidifying option C as the most appropriate choice to describe their characteristics.