Answers

2015-10-24T18:48:18+08:00
These are all considered as symbiotic relationships.
Basically,

Mutualism - Both organisms benefit

Competition - Organisms engage in competition

Parasitism - One organism is the host and the other is a parasite 

Predation - One is prey, the other is the predator

others are pretty self-explanatory...

Hope this helps :)
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