I think the answer is D. Violence only when absolutely necessary he said that there is violence is never necessary.
Answer:
New York, Philadelphia, Washington, Atlanta, Toronto
Explanation:
Human activity has a great impact on waterways. Decreased amounts of vegetation leads to erosion of water banks. Increased fertilizer and nutrients levels in water from agriculture, sewage, and industry lead to the formation of algal blooms and subsequent decrease in other aquatic organisms.