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

[EX Q]: Flytraps spin when _ creatures can be infected.
[EX A]: no

[EX Q]: Crustaceans have _ major body parts .
[EX A]: three

[EX Q]: Caterpillars are grayish with five pairs of blue spots and _ pairs of red spots along their back.
[EX A]:
six