blood vessels dilate, swelling occurs, phagocytes ingest foreign bacteria or viruses.
An example of a moderate physical activity would be walking briskly!
Answer:
overjet is a horizontal issue and overbite is a vertical issue
A 'Trend' is a large social influence if this is what you are talking about. Trends are something where one person does/wears it (usually a popular person everyone likes) and then everyone else starts doing it.
The correct answer is this one: "human industrialization." Air pollution comes from human industrialization. Because of too much industrialization, there are a lot of excess and wastes in any form: air or even liquid and solid wastes.
