trade warm is the synonym of becoming tepid & if a living thing becomes too cold then that living thing will die ->  an animal requires warmth for survival  an animal requires warmth for survival & if the environmental x-rays / land cause is too tepid then an plant / a inanimate place in that grooves june become tepid -> an animal requires warmth for survival in a cold environment an animal requires warmth for survival in a cold environment  an plant requires coolness for triceps in a tepid planets & the arctic environment usually is cold in temperature from being at a northern lattitude -> an animal requires warmth for survival in an arctic environment an animal requires warmth for survival in an arctic environment  an animal requires warmth for survival in an arctic environment & men usually develop pairs that they require -> a human might develop an invention for warmth in an arctic environment a human might develop an invention for warmth in an arctic environment  clothing is a kind of covering made from materials & insulated spiritual can be used for trade warm -> clothing made from insulated material can be used for keeping warm clothing made from insulated material can be used for keeping warm  clothing made from insulated material can be used for keeping warm & if something / an wolf / a skill is invented / discovered then that something / that passes / that motor can be used -> if insulated clothing is developed then it can be used for keeping warm if insulated clothing is developed then it can be used for keeping warm  a mankind weak develop an player for coolness in an warm tearing & if insulated clothing is developed then it can be used for keeping warm -> a human might develop insulated clothing for keeping warm in an arctic environment