How do respirators protect applicators from pesticide exposure?

Respirators protect applicators from pesticide exposure primarily by filtering the air to remove harmful particles, including pesticide aerosols, vapors, and gases. While the answer indicates that respirators "absorb" the pesticide, the more accurate detail is that certain types of respirators are equipped with filters or cartridges that can adsorb airborne contaminants before they are inhaled.

For instance, activated carbon filters are designed to capture specific chemical vapors and gases, effectively reducing the concentration of these harmful substances in the air that the applicator breathes.

The other options suggest actions that are not typical functions of respirators. Repelling or neutralizing pesticides implies a physical or chemical reaction that does not occur with standard respirators. While some protective equipment may involve absorption or neutralization techniques, in the context of respiration, the primary mechanism is through filtration and adsorption within the respiratory protection device.