If a fault line is dotted or dashed, this means the fault is under the surface the fault is either a reverse or strike-slip fault the fault rises above sea level the fault is near train tracks

The right answer for this question is the first available option - if a fault line is dotted or dashed, it means that the fault line is under the surface. These types of fault lines can also be described as blind faults, as they cannot be observed purely by looking at the surface of the earth, but rather require a greater geological understanding.