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

[EX Q]: Asian lions divide themselves into _ prides.
[EX A]: two

[EX Q]: Planaria has rudimentary eyes which produce _ images but detect direction.
[EX A]: no

[EX Q]: Insects develop from an egg into an adult in _ ways.
[EX A]:
three