Final answer:
The correct ways to address non-crushable structures outside the primary structure are reinforcement, which increases strain endurance, and isolation, which provides protection from stress-inducing forces.
Step-by-step explanation:
The question asks about the two ways that non-crushable structures outside the primary structure may be addressed. The correct option is Option 1: Reinforcement and isolation. Reinforcement acts to improve the structural integrity, increasing the range of strain a material can handle before it reaches its breaking point. This is particularly important for materials which require tensile strength, as they must resist being stretched, similar to cellulose or chitin microfibrils found in cell walls. Isolation is another strategy used to protect structures from forces such as expansion and contraction, which can cause stresses that potentially lead to damage or failure.
For example, in the context of biological cells, cell walls provide tensile strength to resist the compressive force from an aquatic or terrestrial environment. Similarly, in engineering, I-beams are used in construction to minimize bending strains in structures, ensuring that they can withstand both compressive stress and tensile stress.