Final answer:
The correct option is B. Light-colored smoke is typically made up of organic particles that form from the oxidation of organic materials in the atmosphere, which is part of the smog-forming process.
Step-by-step explanation:
Light-colored smoke is often a result of certain gas molecules cooling and condensing into tiny particles, which are then dispersed in the air. The correct answer to which type of smoke aerosols form as gas molecules cool and condense, appearing as light-colored smoke, is B) Organic particles.
These particles originate from the oxidation of organic materials, including hydrocarbons from plants, and are prevalent in smog. Unlike black carbon aerosols, which are solid carbon particles resulting from incomplete combustion and appear as dark or black smoke, organic particles tend to produce lighter-colored smoke due to their different composition and the way light interacts with them.