94% level 61 answers 94% it produces heat 27% oven 22% sun 21% fire 18% heater 4% lamp 2% body 94% something you can no longer live without 25% food 20% phone 12% water 12% family 11% love 5% air 5% internet 4% friends 94% woman holding coffee cup picture 35% warm 23% winter 19%