The anwser c should be correct
Answer:
B. mercury
Explanation:
Mercury is one of the most common toxic chemicals that can be found in contaminated fish. This is because mercury has become a common pollutant in rivers and other waterways since it it commonly used in mining and industrial operation, and these operations end up throwing the mercury into the waterbodies, where the fish absorb it.
Answer:Immigration isn’t exactly a new occurrence in the United States. Still, despite a rich history of welcoming strangers into the country, it seems that the voices of critics calling for stricter immigration policy only get louder and fears over the negative economic impact immigrants might have continue to grow. It’s worth asking, in a country where nearly everyone’s ancestral line includes an immigration story, how things got that way.
Explanation:
Urban areas developed subways, elevated trains, and streetcar systems because if all commuters rode in cars it would cause traffic jams and major traffic. It made it easier for people to move around in bigger cities.
