Which agricultural chemical is primarily used for controlling weeds?

The correct answer is herbicide, which is a type of agricultural chemical specifically designed to kill or inhibit the growth of unwanted plants, commonly referred to as weeds. The primary function of herbicides is to manage weed populations that compete with crops for resources such as sunlight, water, and nutrients. By effectively controlling these weeds, herbicides help improve crop yields and maintain agricultural productivity.

Fungicides, on the other hand, are used to control fungal diseases in plants, and they would not be effective against weeds. Pesticides is a broader term that encompasses various chemicals used to control pests, which can include insects, fungi, and certain weeds; however, it does not specifically refer to weed control. Insecticides are focused solely on managing insect pests and are not effective against weed growth. Therefore, when addressing the specific need for weed control in agriculture, herbicides are the targeted choice.