Which of the following is a characteristic of secondary intention healing?

Secondary intention healing is characterized by the granulation tissue filling the wound space. In this type of healing, the wound is left open and the body creates new tissue to close the wound naturally over time. This process involves the formation of granulation tissue, which is a combination of new connective tissue and blood vessels that forms on the surface of a healing wound. This granulation tissue fills in the wound defect and brings about healing from the wound's base up to the surface.

The other options do not accurately describe secondary intention healing. For example, wound edges being approximated is a feature of primary intention healing, where the edges of the wound are brought together to heal quickly. The assertion that no new tissue forms contradicts the fundamental process of secondary intention healing, which is predicated on the formation of new tissues. Lastly, rapid wound closure is also a hallmark of primary intention, whereas secondary intention typically takes longer due to the involvement of granulation tissue formation and other healing processes.