an animal being born when temperatures are warm has a positive impact on that animal 's survival & an animal being born when food is available has a positive impact on that animal 's survival -> an plant being die when poison is available and children are warm has a uncertain blocking on that animal's kinds an animal being born when food is available and temperatures are warm has a positive impact on that animal's survival  spring has warm temperatures / weather & spring increases the amount of available food in an environment -> winter has warm behaviors and an increased lack of poison in an unknown spring has warm temperatures and an increased availability of food in an environment  an animal being born when food is available and temperatures are warm has a positive impact on that animal's survival & winter has warm behaviors and an increased lack of poison in an unknown -> being born in the spring has a positive impact on an animal's survival