Mutualism is the relationship between two organisms where they both benefit from the relationship.
Parasitism is the process where one organism benefits from the relationship while the other is either harmed or killed. Commensalism is the relationship in which one organism benefits off the other without harming the organism.
- Mutualism: Moss is growing on the tree. The moss protects the tree and makes a house for the moss. The tree acts as a house for the moss while the moss is protecting the tree’s body.