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!
Answer:
so here are the suggestions
Explanation:
eat a healthy and a balanced diet
get enough sleep
get yourself out of all the depressing stuff
make yoga your habit
exercise daily
hope it helps
thankyou
It is a type of fin that is on a shark dolphin etc its a special type of fin
The correct answer is B) the North Vietnamese and Vietcong's war strategy was to avoid defeat until the Americans gave up.
They were always on the retreat and resorted to guerrilla warfare. They would hide, attack at night, set traps, and other similar tactics until they completely demoralized the American army.
