Answer:
2
Explanation:
3 is physical 4 is as well so it has to be 1 or 2
This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice. As a consequence the surrounding seawater gets saltier, because when sea ice forms, the salt is left behind. As the seawater gets saltier, its density increases, and it starts to sink.
B: untied nations i do mj ethics
Answer:
The year the Greek city of Helike disappeared is -⅕ times the year the US Civil War ended. Let w represent the year the Civil War ended.
Explanation:
True; with improvements in technology/manufacturing, acid rain became a major problem
