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

[EX Q]: Grasshoppers develop through _ to six instars.
[EX A]: five

[EX Q]: Anemone has _ vents.
[EX A]: two

[EX Q]: Birds begin dying of fowl cholera four to _ days after exposed to the virus.
[EX A]:
nine