Why Do Leaves Fall Off?

The little bird is still very young. She doesn't know that the dead leaves fall for the growth of flowers, and the flowers fall for the growth of green leaves and fruits. The little sika deer is also very small. She doesn't know that different flowers have different flowering periods. They seemed to understand but began to look forward to summer and every subsequent season. Concept: The little bird is still very young. She doesn't know that the dead leaves fall for the growth of flowers. The flowers fall for the growth of green leaves and the growth of fruits. The little sika deer is also very small. She doesn't know that different flowers have different flowering periods.