Which component is critical for the skin's elasticity?

Collagen fibers are critical for the skin's elasticity because they provide structural support and strength. Elastin, which is often associated with collagen, allows the skin to stretch and return to its original shape, contributing to its resilience. Together, these proteins form a network that maintains the skin's firmness and elasticity.

While adipose tissue contributes to the overall volume and cushioning of the skin, it does not play a direct role in elasticity. Keratin is a protein that forms the outer layer of skin, providing a barrier for protection, but it does not contribute to the skin's elasticity. Melanin is responsible for pigmentation and protection against UV radiation, but it does not affect the skin's elastic properties. Thus, collagen fibers are essential for maintaining the elasticity and flexibility of the skin, making them the correct answer.