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

[Q]: Meerkats can have one to seven babies at _ time.
[A]: one


[Q]: Cubs emerge from the den when they are four to _ months old.
[A]: six


[Q]: Cumulus clouds come in _ distinct species, cumulis humilis, mediocris, congestus, and fractus.
[A]:
four