**Core Concept**
Structural proteins are a class of proteins that provide structural support and framework to cells, tissues, and organs in the human body. They are essential for maintaining the shape and integrity of various biological structures, from the cytoskeleton within cells to the connective tissue in bones and skin.

**Why the Correct Answer is Right**
Structural proteins, such as collagen, keratin, and elastin, play a crucial role in providing mechanical strength and elasticity to tissues. They form strong bonds with each other and with other molecules, allowing them to withstand various physical stresses and maintain the structure of tissues. For example, collagen is a major component of skin, bones, and tendons, providing tensile strength and elasticity to these tissues.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because structural proteins are not primarily involved in metabolic processes such as energy production or nutrient utilization.
**Option B:** This option is incorrect because enzymes are a class of proteins that catalyze chemical reactions, rather than providing structural support.
**Option C:** This option is incorrect because hormones are signaling molecules that regulate various physiological processes, rather than providing structural support.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that structural proteins are not just passive components of tissues; they actively interact with other molecules to maintain tissue integrity and function.

**Correct Answer:** C. Structural proteins are involved in providing structural support to cells, tissues, and organs, and are essential for maintaining their shape and integrity.