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

[EX Q]: Giraffes have two horns and _ or three knobs.
[EX A]: two

[EX Q]: Bull sharks are a 'requiem' species, reaching up to _ feet in length.
[EX A]: ten

[EX Q]: Asters range in height from _ to three feet tall.
[EX A]:
one