**Core Concept**

The question is about the binding site of myosin heads to actin in skeletal muscles, which is crucial for understanding muscle contraction and the functioning of the sarcomere, the basic unit of muscle fibers. In this context, myosin is a motor protein that powers muscle contraction, while actin is a thin filament protein that forms part of the contractile apparatus in muscle cells.

**Why the Correct Answer is Right**

The correct answer is Option C, which states that the myosin heads bind to actin at the "Thick Filament-Thin Filament Interface." This is where the thick filaments (myosin) interact with the thin filaments (actin) to generate force and movement during muscle contraction. This binding site is essential for the sliding filament theory of muscle contraction, which explains how muscle contraction occurs when actin and myosin cross-bridge cycling.

**Why Each Wrong Option is Incorrect**

Option A ("Neck of Myosin Head") and Option B ("Actin-Myosin Interface") are incorrect because these options refer to specific regions within the myosin or actin molecules, respectively, rather than the actual binding site between the two proteins. Option D ("Myosin Tail") is incorrect because it refers to a part of the myosin molecule rather than the binding site between myosin and actin.

**Clinical Pearl / High-Yield Fact**

The understanding of the binding site between myosin and actin highlights the importance of cross-bridge cycling in muscle contraction. This process involves the interaction of myosin heads with actin, followed by ATP hydrolysis to release energy, which allows the myosin heads to detach and move along the actin filaments, causing the sarcomere to shorten and ultimately result in muscle contraction.

**Correct Answer:**

Option C ("Thick Filament-Thin Filament Interface") is the correct answer because this is where the interaction between myosin and actin occurs, allowing for the sliding filament theory and muscle contraction.