Oceanographers generally recognize three vertical zones in most parts of the open ocean: a shallow surface mixed zone, a transition zone, and a deep zone. What property is used to differentiate these zones

a shallow surface mixed zone    ---     Epipelagic a transition zone   ---    Mesopelagic a deep zone.      Bathypelagic

Explanation:

The most important zone in the vertical distribution of the water is the surface zone and is asp called as the photic zone and is found to a few 200 m from the surface. Also characterized by the small surface zone ad blow which is the deep and dark zone and aphotic zone includes the inter-tidal, the nitric , and the oceanic zones. It has a depth of 4000 meters. In between they lies the transition zone and is about 1000 metes and organisms that live in this zone are bio-luminescent.

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.

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