Snowmobiles are causing problems in some of our national parks. Particulate matter, emitted by engines of vehicles, is a cause of haze and smog.

In the passage above, what is the meaning of the words particulate matter?
A.
soot
B.
haze
C.
smog
D.
particular

A. Soot

Explanation:

Soot is the smoke or exhaust that comes from engines of vehicles. The text also says "cause of haze and smog" so it could not be B or C. D just doesn't make sense.

- "there are several movements that doris lessing was associated with. first of all, communism. she pursued her communist beliefs and included them in her writing, and was also a member of several communist book clubs. she is also strongly associated with feminism, her fight for equality and women's rights.

doris lessing is the kind of writer who has followers, not just readers. they have been engaged to her chiefly because of her involvement in major problems, such as politics and woman-ism."

the answer should be a)directions.