I mark lines that cannot be crossed, create spaces that don’t exist, and vanish once touched. What am I?

Category: Wordplay · Difficulty: hard

Hint: Think about something temporary and fragile rather than permanent.

Answer

A border drawn in the sand

Explanation

Lines in sand are boundaries but disappear easily, differing from solid, physical barriers.

This is a hard wordplay riddle — a tricky one that takes a little thought. The answer is A border drawn in the sand.

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