The three correct answers that describe the differences between solar wind and geomagnetic storms are:
- Geomagnetic storms occur only occasionally; solar wind is constant.
- Geomagnetic storms are associated with CMEs; solar wind is associated with the constant activity in the sun.
- Solar wind sometimes results in geomagnetic storms; geomagnetic storms do not cause solar wind.
These statements highlight the differences in frequency, association with solar phenomena, and the causal relationship between solar wind and geomagnetic storms.