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

[Q]: Cleavage is imperfect in _ directions, prismatically.
[A]: two


[Q]: Germs have _ means of locomotion execpt to attach themselves to particles of dust.
[A]: no


[Q]: Alpacas are ruminants with _ stomachs and very efficiently convert hay and grass to energy.
[A]:
three