Two red and two overlapping balls in the center are surrounded by a green, fuzzy, circular cloud with a white line running through it. Two green balls sit on the white line, and a line leading a bracket around the balls is labeled A. A line leading to a bracket overlapping the white line is labeled B. Which is a characteristic of the part of the atom marked "A”?
It contains most of the mass.
It is negatively charged.
It is mostly empty space.
It is composed of electrons.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

for a different answer set the answer would be because the oxygen in the water had depleted (apex)