I would say burning and combustion of fuels. hopefully that helps you.
I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
Adequate and proper dressing is a necessary step for exercises during the summers as it affects the workouts. Fabric that is moisture-wicking is the most important thing.
<h3>What are moisture-wicking fabrics?</h3>
Moisture-wicking fabrics are the dress material that can pull the moisture and sweat from the skin during the workouts by the capillaries built in the fabric itself.
Workout and exercises in summers result in more sweat loss and hence the fabric of the dress should be able to evaporate this sweat from the skin to the outer surroundings.
Therefore, option C. moisture-wicking clothes are most important.
Learn more about exercise clothes here:
brainly.com/question/10488779
