I'd go for a major overhaul-- and a Z in freezing : Blubber insulates polar bears from freezing air and cold water and acts/serves/functions as a nutritional reserve when food cannot be found.
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Mister MicawberI'd go for a major overhaul-- and a Z in freezing:Thanks, Mister.
Blubber insulates polar bears from freezing air and cold water and acts/serves/functions as a nutritional reserve when food cannot be found.
Mister MicawberThe difference in keep off and keep from is simply the prepositions-- off implies 'not on' and from implies 'not toward'-- but neither seems natural or appropriate here; a more formal, scientific vocabulary is required.
As for nutritional vs nutritious: I suppose either is possible. I chose the one that s