Which term describes the suspension of particles in air such as dust or fog?

The term that describes the suspension of particles in air, such as dust or fog, is "particulate matter." This term specifically refers to tiny particles or droplets that are suspended in the atmosphere. Particulate matter can come from various sources, including natural elements like dust and smoke, as well as human activities, such as industrial emissions and vehicle exhaust.

Understanding particulate matter is important in environmental science and health, as these suspended particles can have significant impacts on air quality and human health when inhaled. This concept is crucial in pest management as well, especially when considering the effects of pesticides that may also become airborne, leading to unintended exposure.

The other terms, while relevant in different contexts, do not adequately describe the phenomenon of airborne particles. "Pest" refers to organisms that can have harmful effects on crops, "persistent pesticide" refers to chemicals that remain in the environment for an extended time, and "pellet" typically describes a small, rounded mass and does not convey the suspension of particles in air. Thus, the most accurate term to describe the suspension of particles like dust and fog is indeed particulate matter.