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

[EX Q]: Zeolites have basically _ different structural variations.
[EX A]: three

[EX Q]: Coho usually live for _ years and grow rapidly in their final year.
[EX A]: three

[EX Q]: Altricial chicks are tended and brooded by female the first _ days.
[EX A]:
ten