What distinguishes Avenger class ships in terms of construction material?

Avenger class ships are distinguished by their construction using composite materials. This innovative approach allows for a reduction in weight while still ensuring structural integrity and strength. The use of composite materials contributes to improved performance characteristics, such as enhanced speed and maneuverability, while also reducing the overall radar cross-section, which is beneficial for stealth operations. These materials typically include fiberglass or Kevlar, which are known for their durability and resistance to corrosion, making them advantageous in the maritime environment.

The other construction methods, such as reinforced concrete or traditional steel frames, do not apply to the Avenger class, as these ships primarily rely on the advanced characteristics of composite materials for their design. Hybrid materials can involve combinations of different types but do not specifically capture the essence of what makes the Avenger class unique, which is fundamentally the emphasis on composite materials. Thus, the correct answer highlights an important aspect of modern naval engineering used for optimizing ship performance and effectiveness.