Here's a breakdown:

* Transparent materials allow light to pass through them almost completely, without significant scattering or absorption. Examples include glass, water, and air.

* Translucent materials allow some light to pass through, but scatter it, making objects seen through them appear blurry or hazy. Examples include frosted glass, wax paper, and some types of plastic.

* Opaque materials block all light from passing through. Examples include wood, metal, and thick walls.

So, the answer to your question is transparent materials, but it's important to understand the difference between these three categories to fully grasp how materials interact with light.