What are the main changes in nature?

Changes are of different types.
Major changes in wildlife:
1) In plants (leaf fall; leaf color change);
2) In animals (preparation for winter; migratory birds fly away; nomadic birds arrive, insects disappear; disappearance and emergence of various types of insects and, consequently, a change in food chains)
Major changes in inanimate nature:
1) Terrain relief (rocks, the emergence of plains, and so on);
2) Change of seasons;
3) Change of day and night.



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