The falling red is not a heartless thing, it turns into spring mud to protect the flowers. ---The decomposition of microorganisms. The grass on the original soil will wither and flourish every year. Wildfires never burn out, but the spring breeze blows and grows again - the resilience and stability of the grassland ecosystem. The spring scenery fills the courtyard and cannot contain a branch of red apricot coming out of the wall - phototropism is like a spring breeze coming one day, and thousands of pear trees are blooming - -Plant flowering is affected by temperature and light. At noon on the day of hoeing, sweat drips from the soil ------ sweat dissipates heat, and the inorganic salts and urea from sweat are used for plant growth. The world is full of beauty in April, and peach blossoms in mountain temples begin to bloom -- -The effect of temperature on plant growth. Flowers planted intentionally do not bloom, while willows planted unintentionally create shade. ---Nutrient reproduction. The spring breeze does not reach Yumen Pass. ---The effect of altitude on living things. Once bitten by a snake, you will be afraid of well ropes for ten years---conditioned reflex. (Proverb) The auspicious snow heralds a good year - the low temperature freezes to death many pests; the fragrant rice flowers bring a good harvest, and you can hear the sound of frogs - beneficial insects, pests and a good harvest; the mantis stalks the cicada, followed by the oriole - the food chain is closer to the water, the first to get the moon is to the sun. Flowers and trees are easy to spring. --Sufficient light makes plants grow vigorously. Sunlight makes everything glow. ---Sunlight is the energy source of the ecosystem. Rain and dew nourish and strengthen seedlings, and all things grow dependent on the sun. ---Plant growth is related to water and sunlight. Stop and sit in the maple forest at night, the frost leaves are as red as the February flowers. --In autumn, chlorophyll decomposes, anthocyanins appear, and maple leaves turn red. It is particularly beautiful. Two orioles sing in the green willows, and a row of egrets ascends to the blue sky.

---Seasonal breeding and migration behavior of birds