What are the three main zones of the open ocean?

surface mixed zone, transition zone, deep zone

pycnocline zone, transition zone, cold-water zone

surface mixed zone, pycnocline zone, deep zone

surface mixed zone, transition zone, deep zone

Explanation:

The "open ocean" is that part of the ocean which lies outside of the seashore (coastline). It consists of many different kinds of marine life and it doesn't include the seafloor.

The open ocean primarily consists of three main zones: surfaced mixed zone, transition zone and deep zone.

The surfaced mixed zone is a mixture of different zones. It is considered shallow, which is about 300 to 450 meters in depth. It also includes the sun-warmed zone.

The transition zone is located in-between the surface layer and the deep zone. This also includes the pycnocline and thermocline.

The deep zone's water is always of high-density. The temperature here is very low (just a few degrees above the freezing point). The sunlight cannot reach this zone.

the answer

d. he trained to be a lawyer in england before returning to his country to fight for its independence from england.

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