Final answer:
DeLancey's level 2 vaginal support involves the attachment of the vagina to the pelvic sidewalls by the fibromuscular paravaginal attachment.
Step-by-step explanation:
DeLancey's levels of vaginal support are a classification system used in gynecology to describe the support structure of the vagina, which is pertinent to conditions such as pelvic organ prolapse. Level 2 support specifically refers to the attachments of the vagina to the pelvic sidewalls by the fibromuscular tissue known as the paravaginal attachment. This level of support is crucial for the proper positioning and function of the vagina and the organs adjacent to it, such as the bladder and rectum.