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

[Q]: Communion is that which is shared between the _ persons of the Holy Trinity.
[A]: three


[Q]: Ozone is a form of oxygen in which the molecule contains _ atoms instead of two.
[A]: three


[Q]: Elephants have five toes on the fore feet and _ on the hind feet.
[A]:
four