Adam Clarke Bible Commentary

I will answer also my part - אענה חלקי aaneh chelki, "I will recite my portion." We have already seen that the book of Job is a sort of drama, in which several persons have their different parts to recite. Probably the book was used in this way, in ancient times, for the sake of public instruction. Eliphaz, Zophar, and Bildad, had recited their parts, and Job had responded to each: nothing was brought to issue. Elihu, a bystander, perceiving this, comes forward and takes a part, when all the rest had expended their materials: yet Elihu, though he spoke well, was incapable of closing the controversy; and God himself appears, and decides the case.