What is a characteristic of non-selective pesticides?

Non-selective pesticides are designed to kill a broad range of plants and are often used for weed control in areas where complete vegetation removal is desired, such as driveways, sidewalks, and certain agricultural practices. These products do not discriminate between different types of plants; they eliminate both weeds and desirable plants. This characteristic is crucial for managing areas that require a clean slate for replanting or for controlling invasive species.

In contrast, selective pesticides are engineered to target specific types of plants while leaving others unharmed, which is beneficial when you want to preserve certain plants in a garden or agricultural setting. The other options describe actions not typical of non-selective pesticides, such as limiting their effect only to weeds or being harmless to all plants, which does not align with their comprehensive killing capability.