What is a `NameError` and how can it be resolved in Blender's Python?

`NameError` occurs when you try to use a variable that hasn't been defined. To resolve this, ensure that the variable is declared before it's used. Use the `print()` function to confirm the variable's existence and value. Double-check for typos in variable names. If the variable is defined in a different scope (e.g., a different script or module), make sure the necessary import statements are included.