Trees are perennial plants with a single elongated stem or trunk that supports branches and leaves. They have root system underground anchors them absorbs water nutrients. made of woody tissue for strength vascular tissues to transport materials. Leaves on trees carry out photosynthesis converting sunlight into energy feed the tree's growth.Trees play vital roles in environment: they produce oxygen through absorb carbon dioxide help mitigate climate change reduce air pollution. Their roots prevent soil erosion by holding place regulate cycle absorbing stormwater. Many long-lived some reaching thousands years provide habitats countless species as well resources like timber food fuel.