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

[EX Q]: Black widows mature in two to _ months.
[EX A]: four

[EX Q]: Canadian women have a _ in nine chance of getting breast cancer.
[EX A]: one

[EX Q]: Lobsters have _ distinctive life stages with separate ecologies and behaviors.
[EX A]:
three