What are hygroscopic particles known for?

Hygroscopic particles are known for their great affinity for water. These substances attract and hold water vapor from the atmosphere, which can lead to the formation of droplets or even affect the humidity levels in their surroundings. This property is significant in meteorology, particularly since hygroscopic particles play an essential role in cloud formation and precipitation processes. For example, when hygroscopic particles are present in the atmosphere, they can serve as nuclei around which water droplets condense, ultimately contributing to cloud development.

In contrast, hygroscopic particles do not repel water; this is contrary to what option A suggests. They also do not specifically possess the ability to evaporate quickly, as noted in option C, which may instead relate to substances that do not hold water well. Lastly, while some particles may be non-reactive with air, the defining characteristic of hygroscopic materials is their attraction to water, not their reactivity or lack thereof. Thus, the answer emphasizing their affinity for water accurately represents the fundamental aspect of hygroscopicity.