Name of Relationship			Examples
Mutually Beneficial Relationship	One Half Benefits	One Half Benefits	barracuda and cleaner fish, humans and their pets, bees and flowers, a good marriage
Commensual Relationship	One Half Benefits	One Half Is Unaffected	A remora clings to a shark and gets a free ride to meals, but the shark receives neither harm nor benefit. Birds build their nests in trees away from predators, but the tree receives neither harm nor benefit.
Parasitic Relationship	One Half Benefits	One Half Is Harmed	Lampreys, leeches, mosquitoes and tapeworms all feed on other creatures in a way that harms them.
Ammensual Relationship (rare)	One Half Is Unaffected	One Half is Harmed	Penicillin kills bacteria, but receives no benefit from doing so; human pollution sometimes destroys life, but we receive no benefit from doing so; when sheep or cattle make trails in grass, killing it, but receive no benefit from the grass.

Write an essay about mutual or "win-win" relationships

Possible Strategies:

§ Write about a relationship you currently have or have had with a person (parent-child, friend-friend, boyfriend-girlfriend, etc.)

§ Write about a mutual between two people you know.

§ Detail the necessary elements, traits, or characteristics of a successful mutual relationship.