Which term describes the time span during which a pesticide remains effective for pest control?

The term that describes the time span during which a pesticide remains effective for pest control is "The amount of time that a pesticide remains active to control pests." This term refers to the duration for which the pesticide continues to be potent and capable of effectively managing the pest population it targets.

Options A, C, and D are not relevant to describing the effectiveness period of a pesticide. Option A pertains to the term "leaching," which is about the flow of water and dissolved pesticides through porous materials. Option C describes a pest's life cycle duration, specifically one that lives longer than two years. Option D refers to the downward movement of water through soil, which is known as infiltration. These options are not related to the duration of pesticide effectiveness for pest control.