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

[EX Q]: Sweet corn accounts for about _ per cent of total corn production in Ontario.
[EX A]: five

[EX Q]: Stroke is our nation's number _ killer, and a leading cause of disability for older adults.
[EX A]: three

[EX Q]: Wetlands perform _ important functions in relation to climate change.
[EX A]:
two