What are the effects of seasonal changes on animals and plants?

Impact on animals: Spring: After the whole cold winter, food supply is insufficient, and animals are generally thin and yellow. As the weather gets warmer, mammals begin to shed their thick fluff and gradually move to safe areas where food is gradually abundant. Summer: Animals have beautiful bodies and smooth fur. Animals will choose this time to form a family and give birth to offspring. Autumn: Early autumn is influenced by the climate, and the temperature difference between morning and evening is large, which is convenient for the fruits of plants to lock more sugar, so the nutritional value of autumn fruits is the highest, and animals will choose to save food or fat at this time to meet the needs of winter. Winter: Animals are relatively fat, and due to the influence of climate, they begin to become thick and warm fluff. Even the coat color of some animals will change greatly, such as the mountain rabbit in the Arctic. In summer and autumn, the coat color is brownish gray (hay color), and in winter, the coat color is all white, with considerable color difference.

Impact on plants: In temperate regions, most very green plants begin to germinate in spring, grow leaves and start to grow (some are still in bloom), summer is a vigorous growth period, fruits and seeds in autumn are collected or spread by themselves when they mature, and plants in winter fall into dormancy (perennial plants) or plants wither and seeds dormancy (millet).