Which statement is true regarding healthy gingiva?

Healthy gingiva is primarily composed of connective tissue, which provides structural support. This connective tissue is covered by a layer of epithelium, allowing for the attachment to the underlying tooth structures and bone. This composition is essential for the stability and strength of the gums, ensuring they hold firmly to the teeth while also allowing for some degree of flexibility.

The other options do not accurately reflect the characteristics of healthy gingiva. For instance, healthy gums typically exhibit a pink hue, not uniform redness, which can indicate inflammation or disease. Additionally, healthy gingiva should not bleed upon brushing; bleeding is often a sign of gingivitis or other periodontal issues. Lastly, while healthy gingiva can have a certain amount of resilience, it is generally not considered soft and spongy, but rather firm and resilient to provide proper support for the teeth.