**Core Concept:**
Myoblasts are precursor cells that differentiate into skeletal muscle fibers during embryonic development. In vertebrates, myoblasts originate from somites, which are segmental structures formed from the paraxial mesoderm. The diaphragm, being a skeletal muscle, also requires myoblasts from specific somites for its formation.

**Why the Correct Answer is Right:**
The diaphragm is a vital muscle for respiration, and its development requires the contribution of myoblasts derived from specific somites. In humans, the somites that give rise to diaphragm myoblasts are derived from the presomitic mesoderm and the presomitic mesoderm-derived cells. In this case, option D is the correct answer as it mentions both the presomitic mesoderm and the formation of presomitic mesoderm-derived cells, which are responsible for the development of diaphragm myoblasts.

**Why Each Wrong Option is Incorrect:**
A. This option is incorrect because it refers to somites that are derived from the presomitic mesoderm, which contributes to the development of other skeletal muscles but not the diaphragm.
B. This option is incorrect as it discusses the somites from the presomitic mesoderm-derived cells, which are involved in the development of the diaphragm, but not specifically mentions the formation of diaphragm myoblasts.
C. This option is incorrect as it only refers to the somites from the presomitic mesoderm-derived cells, which is not the primary source of diaphragm myoblasts. The correct answer should mention the formation of presomitic mesoderm-derived cells, which develop into diaphragm myoblasts.

**Clinical Pearl / High-Yield Fact:**
The somites are the primary source of presomitic mesoderm-derived cells, which help form the presomitic mesoderm and contribute to the development of various skeletal muscles, including the diaphragm. Understanding the somite development and the role of presomitic mesoderm-derived cells in muscle development is crucial for understanding the embryological basis of musculoskeletal system formation, as well as the clinical implications of congenital abnormalities in somite development and the resulting musculoskeletal disorders.