Answer:
It has gotten worse.
Explanation:
In the past 30 years, air quality in the United States has declined almost exponentially. Pollution is the main reason for the declination of air quality in the United States, but there are different kinds of pollution, including light pollution, noise pollution, air pollution, water pollution, etc. Air pollution can be caused by primary or secondary pollutants. Primary pollutants include carbon, nitrogen, and sulfur oxides as well as just general particles in the air. Secondary pollutants are formed when pollutants are exposed to sunlight via chemical reactions.
Answer:
d) descent with modification
Explanation:
According to my research on Darwin's theory of natural selection, I can say that based on the information provided within the question the term being described is called descent with modification. This basically refers to the most dominant traits being passed down from generation to generation, and being modified little by little in each lineage. Which is done through natural selection.
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<span>Market demand for goods associated with a species.</span>
