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!
I believe the correct answer is B, because exercising takes self control and discipline <span />
Answer:
Tadpoles start off having gills like a fish but the older they get there gills start to disappear they breathe like fish because they do have gills as younglings.
Hope this helps!!
Explanation:
Identifying populations of interest at the community level is done by identifying the population at risk for the problem.
<h3>What is
populations ?</h3>
The term "population" usually refers to the total number of people living in a certain area, such as a city or town, region, nation, continent, or the entire world. Governments frequently use censuses, a procedure for gathering, analyzing, compiling, and releasing statistics regarding a population, to determine the size of the resident people within their jurisdiction
Population refers to a group of people who share some established characteristics, such as location, race, ethnicity, nationality, or religion, in sociology and population geography. The social science of demography involves the statistical analysis of populations.
To learn more about populations from the given link:
brainly.com/question/19829891
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