The discussion clarifies that the volume integral of zero equals zero due to the nature of integration types. Volume integrals are treated as iterated definite integrals, while the integral of zero refers to indefinite integration. The expression for the volume integral of zero, represented as ∭V 0 dV, simplifies to zero because zero is a constant that can be factored out. Thus, the result of the volume integral remains zero regardless of the volume V. Understanding these distinctions in integration types is crucial for grasping why the volume integral of zero is zero.