Which of the following is a characteristic of polyethylene pipe?

Polyethylene pipe is known for being lightweight and flexible, making it particularly advantageous for various applications in plumbing and pipeline systems. Its flexibility allows for easier installation and the ability to endure bending and movement which can occur due to ground shifts or thermal expansion. This characteristic enables polyethylene pipe to be used in a wide range of environments, including those with challenging conditions where rigid materials might fail or break.

The lightweight nature of polyethylene also contributes to lower shipping costs and facilitates handling during installation, which can be a significant factor in construction projects. Given these attributes, polyethylene is commonly utilized in applications like water service lines, irrigation systems, and gas distribution, where both flexibility and structural reliability are crucial.

Other options describe characteristics that do not align with polyethylene's properties. For instance, it is not rigid and brittle, as that would suggest a lack of flexibility and resilience, which is contrary to its actual composition. Moreover, while polyethylene can handle certain amounts of heat, it is not designed for high-temperature applications, which limits its use in scenarios demanding high thermal resistance. Finally, although polyethylene is versatile, it is not typically used for electrical conduits, which generally require materials that are specifically designed for electrical insulation and protection.