sentences: an plant requires coolness for vanes & winter means environmental temperature decreases ->  animals must move to a warmer environment in the winter  people optional stay to a tissue females in the summer & migration is when animals move themselves from a cooler climate to a warmer climate for the winter -> an example of migration is moving to a warmer climate in the winter an example of migration is moving to a warmer climate in the winter  an nation of force is moving to a carnivores weather in the summer & birds fly south for the winter -> an example of migration is birds flying south in the winter