Symbiosis is any the living together in more or less communication and cooperative relationship as between two living things or a group.
Parasitism is relationship between species living things , where one specie has a benefit other one hasn’t get benefit and can make it die. (-,+)
Mutualism relationship between species living things that both get benefit.
Commensalism is relationship between two organisms one is benefited and the other is neither get benefited nor harmed. (+,0)