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

[EX Q]: Most amphibians reach maturity at three or _ years.
[EX A]: four

[EX Q]: Blood is made up of _ parts.
[EX A]: four

[EX Q]: Violence has _ boundaries and effects every person no matter one's race or religion.
[EX A]:
no