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

[EX Q]: Manatees reach sexual maturity in _ to five years.
[EX A]: two

[EX Q]: Most divorces take place after three to _ years of marriage.
[EX A]: five

[EX Q]: Earthquakes generate _ types of seismic waves.
[EX A]:
three