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

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


[Q]: Electric vehicles have _ tailpipe emissions.
[A]: zero


[Q]: Synthetic waxes can last _ to nine months or longer and typically wipe on and off easily.
[A]:
six