heat from Earth's core radiation from the Sun tidal effects of the Moon motion of tectonic plates
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the main energy source for deep ocean currents that move large volumes of water around the planet?
Possibilities:
- heat from Earth's core
- radiation from the Sun
- tidal effects of the Moon
- motion of tectonic plates

radiation from the Sun