A sunken garden is a garden located below the surrounding ground level. It is typically enclosed by walls or terraces to create a distinct landscape feature with a unique aesthetic appeal.
(A) Paved garden – Incorrect; pertains to gardens with paved paths or surfaces.
(B) Terrace garden – Incorrect; a garden constructed on a terrace or in steps.
(C) Mesh garden – Incorrect; an uncommon garden design term.
(D) Sunken garden – Correct. A garden positioned below ground level.