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

[EX Q]: Every muscle is made up of _ types of fibers.
[EX A]: two

[EX Q]: Falcons are roughly divisible into three or _ groups.
[EX A]: four

[EX Q]: Some rams have _ fully developed horns, a trait shared by few other breeds of the world.
[EX A]:
four