Answer:
'Dreadful' is an adjective; it is describing a condition of some people.
Explanation:
Nick is taking the train into New York City with Tom Buchanan. He begins the chapter by describing an area he calls a valley of ashes. It is an area where ashes from coal burning furnaces are deposited. Everything is gray and lifeless, even the people who work and live in the area.
When a Car is driven, the gasoline burns fuel and releases carbon dioxide into the atmosphere.
The nurse did not know the information
In school buses all sorts of things are left by children.
