When a tree has reached a certain heigh and strength, it helps the younger ones of its kind by giving them some of the nutriments and nurturing them through the fungi network, a.k.a. wood wide web. In the forest, everything is connected through this network, creating a unified organic system living in symbiosis. Trees also warn each other of danger such as insect attack through this network.
Here is a shirt video explaining a bit about this process if you are interested to learn more:
There is much wisdom for us to gain and integrate by observing and learning from nature.
Photos by Gustav Holberg, taken by the ancient oaks in the Hardanger fjord (Tørvikbygd, Norway).