What type of pesticide removes moisture from a pest, leading to its death?

The correct choice is a desiccant, which is a type of pesticide specifically designed to remove moisture from pests, ultimately leading to their death. Desiccants work by drying out the insect's exoskeleton and internal moisture, leading to dehydration. This action disrupts the pest's ability to maintain necessary hydration for survival, which is vital for all living organisms.

In contrast, insecticides are broader in purpose, targeting a wide range of pests without necessarily focusing on moisture removal. Fungicides are used to combat fungal infections and are not applicable to insects or moisture-related issues. Herbicides are designed to control plants and weeds, having no effect on pests as they do not remove moisture. Thus, the specificity of desiccants in extracting moisture from pests underscores their effectiveness in pest management strategies.