Latin root 'bio' means what?

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The concept being tested is recognizing that the prefix bio- denotes life. Although the question states Latin, bio- actually comes from Greek bios meaning life, and it appears in many words related to living things and life processes. For example, biology studies life, a biography tells a life story, and biodegradables relate to living matter breaking down. That’s why the correct meaning is life. The other options correspond to different roots—earth (geo-), water (hydro- or aqua-), and energy (various roots like energy-related but not bio-).