The most sensitive living things to air pollution are—

✅Explanation
-Lichens are symbiotic organisms consisting of a fungus and a photosynthetic partner (algae or cyanobacteria). They are highly sensitive to air pollution, particularly sulfur dioxide and nitrogen oxides. These pollutants can disrupt the lichen's physiology and photosynthesis, leading to their decline or death. Lichens are often used as bioindicators of air quality due to their sensitivity.