The natural world undergoes drastic biological shifts during these transitional times.
Don't wish away Spring and Autumn waiting for Summer or Winter. They are the only times of year you can comfortably be outside all day without freezing or melting. Embrace the layers, eat the seasonal harvest, and enjoy the shift. spring fall autumn
You used both terms in your prompt, and there is a slight distinction in usage: The natural world undergoes drastic biological shifts during