The Electric Field

Electric fields exist in the area surrounding electrically charged particles or objects. If a body is only weakly charged, the field surrounding it is also weak. A single electron, for example, creates a very weak electric field. A high voltage line or a lightning bolt, however, both create a very strong electric field.
Electric fields are invisible, just like an electric current. But to be able to imagine what an electric field looks like and to understand its effect, one can use a model: the field lines of an electric field can be drawn. But there are rules for drawing such a field-line-model:
- the direction of field lines is always from positive to negative
- field lines mustn't cross each other
An example to make it clear:

Which one of the three field-line-models is correct?