1. corals and fish - mutualism, both of them benefit to each other.
2. spiders and deer- commensalism, the spider benefits while the deer doesn't benefit nor harm
3.crocodile and bird- mutualism, both of them benefits.
4. human and mosquito- parasitism, the mosquito benefitted while human are harmed
5. crabs- competition, relationship between organisms in which one is harmed when both are trying to use the same resource related to their survival.
