The composition of plastic metal pipe results in the ________ of plastic and the ________ of metal pipe?

The correct answer highlights the key characteristics of plastic metal pipe, which is known for its durability and strength. Plastic metal pipe typically combines the lightweight properties of plastic with the robustness of metal, resulting in a material that can withstand various environmental factors and pressures while maintaining a lower weight than traditional metal piping. This combination allows for ease of handling and installation, alongside a level of reliability and performance that is essential in numerous applications, particularly in plumbing and industrial settings.

Durability refers to the ability of the pipe to resist wear, pressure, and corrosion over time, while strength pertains to its capacity to handle loads and stresses without failing. This is particularly important in pipe applications that may experience high pressure or abrasive conditions.

In contrast, other options focus on aspects that do not accurately describe the benefits or characteristics of plastic metal pipe. For instance, flexibility and fragility would suggest a material that lacks strength and durability, while lightweight and density highlight an irrelevant aspect in terms of performance and application. Additionally, cost and quality, while important considerations in material selection, do not specifically address the fundamental properties that characterize the composition of plastic metal pipe.