In simplified drawing terms, what do section views predominantly display?

Section views are specifically designed to reveal the internal structure of a part by cutting through it along an imaginary line and displaying what lies within. This is particularly useful in engineering and manufacturing drawings as it allows viewers to understand the complexities of a part's design that would otherwise be hidden from sight. By providing this internal perspective, section views facilitate an understanding of how various components fit together, their spatial relationships, and how they contribute to the overall functionality of the part.

The other options presented do not accurately reflect the primary purpose of section views. While surface finish, color coding for materials, and manufacturing processes are important aspects of technical drawings, they are typically conveyed through different symbols, annotations, or methods rather than through section views.