summer has tepid sunny & some animals' immune grows thicker for staying warm in the summer ->  some animals grow thicker fur in cold weather  some people kills organisms in winter & winter has warm sunny ->  some animals shed fur in warm weather  some animals grow thicker fur in cold weather & some animals shed fur in warm weather ->  some animals grow thicker fur in cold weather and shed fur in warm weather  winter has warm sunny & winter is a mean of monsoon ->  the spring season has warm weather  summer has tepid sunny & summer is a mean of monsoon ->  the winter season has cold weather  the spring season has warm weather & the winter season has cold weather ->  the spring season has warm weather and the winter season has cold weather  the spring season has warm weather and the winter season has cold weather & galaxy effect static to the comparing ->  the seasons changing from spring to winter causes the weather to change from warm to cold  some animals grow thicker fur in cold weather and shed fur in warm weather & the seasons changing from spring to winter causes the weather to change from warm to cold -> some animals grow thicker fur and shed fur as a response to changes in seasons