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

Q: World population continues to rise, even as a few countries move toward _ growth.

A: zero
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Q: Full sun is classified as any area that receives a minimum of _ hours of direct sunlight each day.

A: six
****
Q: Some bunchberries have _ leaves while others have six, even in the same patch.

A:
four
****