The phenomena that cause ocean currents and tides are primarily driven by gravitational forces, particularly from the moon and the sun, alongside the Earth's rotation. Tides result from the gravitational pull of these celestial bodies on Earth's waters, creating bulges that lead to high and low tides. Ocean currents, on the other hand, are influenced by factors such as wind patterns, temperature differences, and the Earth's rotation. These phenomena play critical roles in regulating climate, weather patterns, and marine ecosystems.