Final answer:
The subject of this question is engineering, and it refers to a material used in tapes that is cheap, lightweight, not very accurate, and stretches under stress and moisture.
Step-by-step explanation:
The subject of this question pertains to engineering. Specifically, it is referring to a material that is cheap, lightweight, and used in some 50-foot tapes. This material is not very accurate, stretches under stress and moisture, and is similar to natural rubber in terms of its applications and properties. It is important to note that the material in question is not nylon climbing rope, which has different characteristics.