On the tree saw tree rings are visible. Explain why they have different widths.

1) The width of the tree ring depends on the environmental conditions that changed in different years of the life of the tree.
2) Under favorable conditions, the width of the ring is larger, since the cambium divides more intensively.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.