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

Ipronounced his name, offering him at the same time my hand: he took it, smiling and saying, “we shall do very well by-and-by.” then he laid me down, and addressing bessie, charged her to be very careful that i was not disturbed during the night. having given some further directions, and intimates that he should call again the next day, he departed; to my grief: i felt so sheltered and befriended while he sat in the chair near my pillow… (chapter 3) this passage, in which jane first meets the doctor, is an example of