**Core Concept**
Retinal vessels are a key component of the eye's vascular system, providing oxygen and nutrients to the retina. The development of retinal vessels is a complex process involving angiogenesis, the formation of new blood vessels from pre-existing ones.

**Why the Correct Answer is Right**
The correct answer is related to the process of angiogenesis, which is essential for the development of retinal vessels. Angiogenesis involves the coordinated action of various growth factors, including vascular endothelial growth factor (VEGF), which promotes the proliferation and migration of endothelial cells. The formation of new blood vessels is also influenced by the interaction between endothelial cells and pericytes, which provide structural support to the vessels.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the process of retinal vessel development.
**Option B:** This option is incorrect because it is not a recognized mechanism for the development of retinal vessels.
**Option C:** This option is incorrect because it is not a correct description of the process of angiogenesis.

**Clinical Pearl / High-Yield Fact**
One key point to remember is that retinal vessel development is a critical process that is essential for maintaining retinal health and preventing conditions such as retinopathy of prematurity (ROP) and diabetic retinopathy.

**Correct Answer:** D.