A broken line at the left of your lane means:

A broken line at the left of your lane indicates that you are permitted to change lanes or pass other vehicles as long as it is safe to do so. This type of marking indicates that there are no strict prohibitions on lane changes in that area. The presence of the broken line signifies that drivers have the flexibility to maneuver their vehicles to overtake slower traffic or to move into another lane if necessary, provided they ensure that the way is clear and that they adhere to safe driving practices.

The other options suggest restrictions that do not align with the meaning of a broken line. A solid line, for instance, would indicate that lane changes or passing are not allowed, hence the distinction between the types of lines is important. The broken line encourages safe overtaking but always necessitates caution and awareness of surrounding traffic.