The discrete levels available are

The correct answer is: C. levels

The discrete levels available in a 3D printer are the different heights that the print head can move to. These levels are typically measured in millimeters, and the number of levels available will vary depending on the printer.

The other options are incorrect because:

• A. sides are the faces of a 3D object.
• B. edges are the lines that connect the sides of a 3D object.
• D. bytes are units of data.

I hope this helps! Let me know if you have any other questions.