which of the following is a redundant pair?\no fond memories\no positive result\no vast openness\no extended…

Brief Explanations:

"Vast" and "openness" are redundant as "openness" already implies a large - scale quality. "Fond" is a distinct quality for "memories", "positive" is a separate attribute for "result", and "extended" is a specific characteristic for "stay".

Answer:

vast openness