To determine which item possesses the highest level of inertia, we would need to know the specific characteristics or measurements related to each item (X, Y, Z, W) that the student may have documented in her inquiry. Inertia is typically related to mass and the distribution of mass around an axis of rotation, but without the data provided in the table, it is impossible to answer which item has the highest level of inertia.
If you provide the relevant measurements or findings from the student's table, I could help analyze them and identify which item has the highest inertia.