The energy that drives surface ocean currents such as the gulf stream comes from

Wind energy

Explanation:

The ocean surface water currents are generated due to the wind blowing over the vast ocean. The wind usually blows from a region of high pressure to a region of low pressure, and this is the main driving force for the ocean surface currents. This wind blows in a particular pattern due to the factors such as the rotation of the earth as well as the Coriolis force and is often affected at different latitudinal location. These ocean surface water in the northern hemisphere moves in a clockwise manner and anticlockwise in the southern hemisphere.

The Gulf stream carries the warm and less dense water from the lower latitude to higher latitudes, and during its transportation, the water in it undergoes evaporative cooling.

Thus, wind energy is the main mechanism that drives the surface water current in the large oceans.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

hola:

ef0: daños leves. algunas tejas caídas y otras pequeñas piezas de los tejados arrancadas, algunos daños en canaletas, ramas de árboles rotas y algunos árboles poco profundos arrancados. los tornados que no causan daños visibles (por ejemplo aquellos que se producen en campos abiertos) se valoran siempre como de ef0.

ef1: daños moderados. tejados seriamente despedazados, caravanas y casetas volcadas o seriamente dañadas, perdida de puertas exteriores y ventanas y otros cristales rotos.

ef5: daños increíbles. las casas fuertes pueden quedar arrasadas hasta los cimientos, las estructuras de hormigón armado dañadas críticamente, los edificios altos sufren graves deformaciones estructurales. devastaciones increíbles.

y según esto creo que puedes sacar tus conclusiones. y la verdad la escala ef10 si no se decirte por que no la eh visto o mejor dicho estudiado. espero que te sirva. suerte.