The correct statement is - Ocean currents cause the temperature of air over large bodies of water to change.
The ocean currents are very important factor is the climate of a particular region. They manage to influence the air masses that form above them, so they can be warm and wet, or cold and dry, and that is very important climate-wise, especially for the islands and the coastal regions around the globe.
We can take the British Isles and Canada for example. Even though they are both at pretty much the same latitude, the British Isles have much lesser temperature variations, do not have extremes, and the climate is much more stable. The reason for that is the Gulf Current that is warm and wet, and it makes this region very wet, and the climate is much more moderate. Canada on the other side, is under the influence of cold currents, so it has very big variations in temperature, much less precipitation, and it is much colder.