Final answer:
Surface water is warmer and has more dissolved oxygen and marine life compared to water deep below. The deeper water has significantly higher pressure. The correct option is D.
Step-by-step explanation:
When comparing surface water to the water found millions of meters below the surface, we can infer several key differences.
The surface water is warmer due to its exposure to the sun's rays and the atmosphere. Moreover, surface water typically has more dissolved oxygen because it is in direct contact with the air, which allows for gas exchange.
It is also where more marine life tends to be found, as these conditions are more conducive to sustaining a variety of organisms.
As for pressure, the deeper you go into the ocean, the greater the pressure due to the weight of the water above. Thus, one can infer that water millions of meters below has significantly higher pressure compared to surface water.
This can affect the types of marine life that can survive at such depths. The correct option is D.