Question

based on what you read, what is wastewater?
a a type of thick glue used to keep the pages in a book together
b a special coating put on paper to make it heavy or shiny
c a chemical that is added to paper to give it different colors
d a kind of dirty water that is created when a paper mill makes paper

Explanation:

Wastewater is water that has been contaminated during industrial processes like paper - making. Options A, B, and C describe substances related to paper - making but not wastewater. Option D correctly describes wastewater as dirty water created during paper - mill operations.

Answer:

D. a kind of dirty water that is created when a paper mill makes paper