Which type of deposition involves particles falling out of the atmosphere along with precipitation?

Wet deposition is the correct choice because it refers to the process where atmospheric particles, such as pollutants or nutrients, are removed from the air through precipitation in the form of rain, snow, or other forms of moisture. When it rains, these airborne particles can be captured by the falling droplets and brought to the ground, effectively cleansing the atmosphere of these substances.

In contrast, dry deposition involves the settlement of particles without the assistance of precipitation. This process typically occurs when dust or aerosol particles settle due to gravity or other mechanisms, not requiring any moisture to facilitate their removal from the atmosphere.

Chemical deposition generally refers to the process where chemical compounds precipitate out of a solution, which is not specifically related to atmospheric deposition related to precipitation. Physical deposition might describe physical processes without a specific focus on atmospheric interactions or precipitation.

Thus, wet deposition distinctly highlights the combination of atmospheric particles and precipitation, underscoring its vital role in atmospheric cleansing and nutrient cycling.