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

[EX Q]: Humans host _ species of louse, the head louse , the body louse and the pubic louse .
[EX A]: three

[EX Q]: Special relativity shows that time behaves surprisingly like the _ spatial dimensions.
[EX A]: three

[EX Q]: Wild dingoes can live for up to ten years but usually live for more like _ or six years.
[EX A]:
five