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

[EX Q]: Female cats can go into heat for the first time as early as _ months of age.
[EX A]: five

[EX Q]: Monsoons coming every three to _ years can add almost a foot of water to the mountain's surface.
[EX A]: seven

[EX Q]: Larval development is hypermetamorphic, with _ distinct phases.
[EX A]:
four