Final answer:
An implied line starts and stops, showing gaps in the continuity, which is suggested visually rather than being physically drawn, making it the correct answer for a line that shows continuity gaps. So, the option is 2.
Step-by-step explanation:
The term for a line that starts and stops and then starts again, showing gaps in the continuity of the line is an implied line. In visual arts, an implied line refers to a line that is not actually drawn but suggested by elements in the work that guide the viewer's eye to continue the line in their mind. Leonardo da Vinci's V1rg|n of the Rocks contains wonderful examples where your eyes follow an implied path.
Let's explain the rest options: A dashed line is made up of short, disconnected segments. A dotted line is similar, but composed of dots. A solid line has no breaks and is continuous.
Since the question specifies that the line shows gaps in continuity but starts again, option 2 is the correct option.