Final answer:
Sunlight and air temperature, as well as ocean currents, contribute to keeping water warm.
Step-by-step explanation:
The two things that contribute to keeping water warm are sunlight and air temperature. Solar radiation warms bodies of water, and the temperature of the water affects the growth of organisms and the availability of dissolved oxygen.
In addition, the ocean currents also play a role in keeping water warm. They can transport heat from one temperature zone to another, which can help maintain warmer water temperatures.