Which of the following results in the fall of acid rain?

The fall of acid rain is primarily caused by the emissions of oxides of sulfur (SOx) and nitrogen (NOx) into the atmosphere. When these gases are released from sources such as factories, cars, and power plants, they can react with other substances in the atmosphere, such as water vapor, to form acidic compounds like sulfuric acid and nitric acid. These acidic compounds then combine with other substances in the atmosphere, such as particulate matter, to form droplets that fall to the ground as acid rain. Particulate matter itself can contribute to air pollution, but it does not directly cause acid rain. Oxides of lead and gaseous hydrocarbons are also air pollutants, but they do not directly contribute to the formation of acid rain. Lead emissions are primarily associated with lead poisoning and other health problems, while gaseous hydrocarbons contribute to the formation of smog and ground-level ozone.