Symbiosis: 2 organisms relating together for a long time.

• Mutualism: 2 organisms relating together and the both are benefit- Yucca tree and the Yucca moth
• Commensalism: 2 organism relating together one is benefitand none is harmed- Orchid and Tree
• Parasitsm: 2 organisms relating together and one is benefit and the other harms- Flea and the Dog