Answer:
After see this colour what was the expression of journalist.
Organic matter and nutrients causes an increase in aerobic algae and depletes oxygen from the water column. This causes the suffocation of fish and other aquatic organisms. Sulfate particles from acid rain can cause harm the health of marine life in the rivers and lakes it contaminates, and can result in mortality.
Clark expertly navigated their expedition
The answer is negative four because you must change two negatives into a positive