**Core Concept**
The question is testing the identification of a specific pigment found in the heart of an individual who has passed away due to Alzheimer's disease. This pigment is associated with the accumulation of lipofuscin, a type of waste material that can accumulate in cells over time.

**Why the Correct Answer is Right**
Lipofuscin is a type of waste material that accumulates in cells, particularly in the heart, due to the breakdown of cellular components. In individuals with Alzheimer's disease, the accumulation of lipofuscin in the heart can be exacerbated by the oxidative stress and inflammation associated with the disease. This can lead to the formation of yellow-brown, finely granular pigment in the heart tissue.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate it.
**Option B:** Not applicable, as this option is not provided.
**Option C:** Not applicable, as this option is not provided.
**Option D:** Not applicable, as this option is not provided.

**Clinical Pearl / High-Yield Fact**
The accumulation of lipofuscin in the heart can be a marker of oxidative stress and cellular damage, which is often seen in individuals with neurodegenerative diseases such as Alzheimer's.

**Correct Answer:** D.