In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Some species bear living offspring only every _ to five years.

A: three
****
Q: Perennial grass takes _ to five years before it is mature enough to produce adequate seed.

A: three
****
Q: Sea pigs remain submerged an average of _ minutes, depending on how active they are.

A:
four
****