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

[Q]: Most people have a bowel movement anywhere between three times per day to _ times per week.
[A]: three


[Q]: Excess potassium induces larval metamorphosis in _ marine invertebrate species.
[A]: four


[Q]: All scorpions have _ legs and two pincers.
[A]:
eight