What is the primary use of nonselective herbicides?

Nonselective herbicides are primarily used to control weeds, particularly in areas where there is no desire for any vegetation to remain. These herbicides work by targeting and killing any plant they come into contact with, making them effective for clearing fields, driveways, and other spaces of unwanted plants before seeding new crops or establishing new vegetation.

Option B accurately reflects this primary use, as using nonselective herbicides before seeding helps ensure that the new seeds can establish without competition from existing weeds. This approach is crucial for achieving better success rates in sowing and establishing new plants.

The other options do not align with the primary function of nonselective herbicides. Enhancing soil quality, promoting grass growth, and fertilizing existing plants all pertain to nurturing or improving existing plant life rather than eliminating unwanted weeds. Therefore, the correct focus is on the ability of nonselective herbicides to clear the area of all vegetation before introducing new plantings.