Question

which of the following factors interact to create currents that are 50 m deep?
wind, friction, and the coriolis effect
density, temperature, and salinity
wind, temperature, and salinity
temperature, gravity, and the coriolis effect

Explanation:

Surface currents (which can reach depths of about 50 - 100 meters) are mainly driven by wind. The Coriolis effect (due to Earth's rotation) influences the direction of these currents. Friction (between wind and water surface, and between water layers) also plays a role in shaping the current patterns. Density, temperature, and salinity are more related to deep - ocean currents (thermohaline circulation). Gravity is a general force but not the main factor interacting with wind and Coriolis for these relatively shallow (50 m) currents.

Answer:

wind, friction, and the Coriolis effect