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

[EX Q]: Pelagic division is divided into neritic and _ levels of pelagic provinces.
[EX A]: three

[EX Q]: Trees begin to bear _ to seven years after planting the root shoot.
[EX A]: five

[EX Q]: Wolves have five to _ pups in a litter.
[EX A]:
six