Answer: Because scientist found that the water was polluted.
Explanation:
The best answer for this question would be:
The author had included this part of the paragraph to describe the causes of stress from teens and to derive from its source such as the survey in order for the readers to be informed it is accurate.
C. The BREAK UP OF THE USSR
Is the event that belongs in box c on the chart.
Answer: change? Public Schools took in a huge growth spurt during the late 19th century. Many children who had never received any form of formal education began attending Public Schools. Also, many immigrants began attending public schools.
Explanation:
