Question

atmosphere: match the natural pollutant with its natural source sulfur oxides hydrocarbons carbon monoxide dust

Explanation:

Sulfur oxides can come from the combustion of sulfur - containing fuels. Hydrocarbons have natural sources like plants. Carbon monoxide can be produced by forest fires. Dust can be sourced from dry lake beds. We match based on common knowledge of natural pollutant - source relationships.

Answer:

Sulfur oxides: Combustion of sulfur - containing fuels
Hydrocarbons: Plants
Carbon monoxide: Forest Fire
Dust: Dry lake beds