Explanation:

- The phrase "that which cannot be seen through" describes something that light cannot pass through, making it impossible to see through it.

- Opaque: This term accurately describes materials that do not allow light to pass through, so you cannot see through them.

- Transparent: This means materials that allow light to pass through easily, making it possible to see clearly through them. Not applicable here.

- Impervious: While this can mean resistant, it usually refers to substances that don't allow fluid to pass through, not necessarily related to light.

- Translucent: Describes materials that allow light to pass through but not detailed images. You can see light, but not clear shapes.