GATE 2023 AR — Planning – Question 22
Which landscape device was used in eighteenth-century English gardens to remove the visible boundary between garden and surrounding landscape?
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Correct answer: (B) Sunken fence
Explanation
A sunken fence or ha-ha acts as a physical barrier without an upright fence interrupting the view. It creates visual continuity into the surrounding landscape, so B. Topiary shapes plants; a qanat conveys water, and a stroll garden describes a garden type.