Why Do Trees Send Chemical Signals to Each Other?

Deep underground, trees are like neighbors with a secret phone line. They use tiny thread-like fungi as their wires to send messages.

When a tree gets bitten by a bug, it sends out a chemical signal through the fungi to its friends. It is basically shouting "Help! I have bugs!" so nearby trees can get ready.

It works both ways too. If one tree has too much sugar from sunlight and another needs help because it is in the shade, they send food down the line like passing a snack at lunch. This network helps the whole forest stay healthy and happy.