how can a larger body mass help squirrels survive in the cold winter? For GCSE Thanks :)?

You need to understand the "square cube law" If you double an objects size it's area increases by the square, but it's volume increases by the cube.

What that basically means is the larger is, its volume is in proportion to its heat emitting area is increased so it doesn't cool as fast, we instinctively know this, if you want a block of ice to melt faster you smash into small pieces.

If you tell me which GCSE you're doing I can answer it matched to the specification. Is it Core Science, Additional Science or Biology? Is it AQA, Edexcel, OCR or WJEC? You can respond in a comments box or by answering this question yourself.

It keeps them warm and I'm guessing when they have no food their body is able to use up the stored fat in order to keep them going ( just a guess)

Insalation.