which might you restitch?\na skirt you want to decorate\na hem that has come undone

which might you restitch?\na skirt you want to decorate\na hem that has come undone
Answer
Brief Explanations:
Restitching is done to fix something that is undone. A hem that has come undone needs restitching. Decorating a skirt doesn't necessarily mean restitching.
Answer:
a hem that has come undone