Which type of lines are used to indicate hidden objects or objects above or below the cutting plane?

The correct choice is the dashed line, which is conventionally used in technical drawings to signify hidden objects or elements that are located above or below the cutting plane. This line style communicates to the viewer that there are features or components that are not directly visible in the current view, but are important for understanding the complete geometry of the object.

Dashed lines effectively differentiate these hidden features from visible edges or boundaries, which are typically represented with solid lines. The use of dashes helps in maintaining clarity and improving the readability of the drawing, allowing for a better understanding of the spatial relationships between different elements in the design. This adherence to standard conventions in drafting helps ensure that all stakeholders can interpret the drawings accurately, which is critical in construction and engineering contexts.