1 – < The tree provides food and homes to birds.
> The birds protect the tree from dangerous bugs.
2 – < The tree provides food and protection to bugs.
3 – < Releases oxygen into the air.
> Air feeds carbon dioxide and rains water onto the tree.
4 – < Stabilizes the soil against erosion.
> Soil fertilizes the tree and holds its roots.
5 – > Sun provides energy to the tree for photosynthesis.
6 – < Provides food for herbivores.
> Herbivores spread seeds out to other areas.