Question

gridlines are used to______. make it easy to refer to specific locations on the plan indicate a cross - section of material indicate land boundaries on the site plan indicate that an object has been broken off

Explanation:

Gridlines are a common feature in various fields like design and planning. Their main purpose is to provide a reference system. In the context of a plan (such as a site plan or a design layout), gridlines help in precisely identifying and referring to specific locations. For example, in architectural or engineering plans, gridlines allow professionals to easily locate and discuss different parts of the plan. The other options: indicating a cross - section of material is typically done by section lines or specific symbols; indicating land boundaries on a site plan is usually through boundary lines (not gridlines); and indicating that an object has been broken off is done by break lines.

Answer:

make it easy to refer to specific locations on the plan