Hollow bricks are characterized by what specific feature?

Hollow bricks are fundamentally distinguished by their design, which includes a larger core area. This feature allows for reduced weight while maintaining strength, making these bricks easier to handle and transport. The larger core area also enhances insulation properties and can contribute to better energy efficiency in buildings.

In terms of construction and design, hollow bricks offer advantages such as improved thermal performance and reduced material usage, leading to a more sustainable approach in construction practices. The hollow nature also means they can be used effectively in various applications, including load-bearing walls.

The other options address characteristics that may pertain to other types of bricks or building materials. While lightweight could be an attribute of hollow bricks, it is the larger core area that specifically defines them. The mention of clay is also not exclusive to hollow bricks, as different types of bricks can be made from various materials. Lastly, surface texture is not a defining characteristic of hollow bricks, as their primary feature is the internal structure.