Which of the following chemicals is specifically used to control fungi?

The correct choice, which is designed specifically to control fungi, is a fungicide. Fungicides are a category of agrochemicals that target fungal pathogens, inhibiting their growth or killing them to prevent or treat fungal infections in plants. This is particularly important in agriculture and gardening, as fungi can cause significant diseases in crops and ornamental plants.

While insecticides and herbicides are also important in managing different agricultural challenges—namely, controlling insect pests and unwanted plants (weeds) respectively—they do not target fungi. Insecticides are formulated to manage insects and may contain active ingredients harmful to only specific insect species, thus having no effect on fungal organisms. Similarly, herbicides are focused on suppressing or destroying unwanted vegetation but are ineffective against fungi. Pesticide is a broader term that encompasses various types of chemicals used to manage pests, including fungi, insects, and weeds; however, it does not specify a focus on fungi alone.

Therefore, emphasizing the function of fungicides helps clarify their unique role in crop protection strategies, distinguishing them from other pest management products.