What term refers to a rope or cable that is used to brace something, especially a tent?

The term "guy" specifically refers to a rope or cable used to stabilize or brace structures, particularly in the context of tents or similar setups. This term derives from the practice in outdoor camping and construction where guy wires or guy lines are employed to secure the structure against wind or other forces.

The other terms, while they may refer to aspects of support or fastening, do not have the specific connotation of stabilization that "guy" carries in this context. A "line" can refer to any cord or string but lacks the specificity of being a stabilizing feature. A "strap" typically denotes a flat, elongated piece of material used for binding or securing, while "support" is a broader term that encompasses various forms of assistance but does not directly imply the use of a rope or cable. Thus, "guy" is the most accurate term for the described function.