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

[Q]: Fluoroscopy has _ magnification modes and image capture.
[A]: two

[Q]: Cormorants are monogamous and breed in colonies of up to _ thousand pairs.
[A]: three

[Q]: Diarrhoea kills _ million children under five every year.
[A]:
three