Question

what distinguishes dry masonry construction?
stones are massed in a free - form pattern.
stones are reinforced with mortar.
stones are not dressed.
stones are stacked without mortar.

Explanation:

Dry masonry construction is characterized by the absence of mortar. Mortar is a binding agent typically used in masonry. In dry masonry, stones are simply stacked on top of each other without this binding material.

• The first option about a free - form pattern is more about the aesthetic or layout rather than the defining characteristic of dry masonry.
• The second option mentions mortar (which is not present in dry masonry).
• The third option about stones not being dressed (shaped) is not the key distinction. Dressed or undressed stones can be used in dry masonry, but the absence of mortar is the main point.

Answer:

Stones are stacked without mortar.