**Core Concept**
Eicosapentaenoic acid (EPA) is an omega-3 fatty acid that plays a crucial role in reducing inflammation and modulating cardiovascular health. It is a polyunsaturated fatty acid found in fish oil and other marine sources.

**Why the Correct Answer is Right**
EPA is a key component of fish oil, which is derived from the fatty tissues of fatty fish such as salmon, mackerel, and sardines. The body converts EPA into various eicosanoids, including prostaglandins and leukotrienes, that help reduce inflammation and improve cardiovascular function. EPA also has a role in the prevention of thrombosis and the modulation of immune responses.

**Why Each Wrong Option is Incorrect**
**Option A:** EPA is not primarily found in olive oil, which is rich in oleic acid, a monounsaturated fatty acid.
**Option B:** While flaxseed oil is a rich source of alpha-linolenic acid (ALA), a precursor to EPA, it is not a direct source of EPA.
**Option C:** Coconut oil is predominantly composed of saturated fatty acids, particularly lauric acid, and is not a significant source of EPA.

**Clinical Pearl / High-Yield Fact**
EPA is a key component of fish oil supplements, which are often used to reduce triglyceride levels and improve cardiovascular outcomes.

**Correct Answer: C. Fatty fish (such as salmon, mackerel, and sardines)**