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

[EX Q]: Spatial sensors work in one, two, or _ dimensions.
[EX A]: three

[EX Q]: Milk has _ essential nutrients for active bodies.
[EX A]: nine

[EX Q]: Citrus is picked from trees at least _ years old.
[EX A]:
three