In ecology, the interaction between two or more organisms, or groups of organisms, that use a common resource in short supply.
Commensalism- In ecology, commensalism is a class of relationship between two organisms where one organism benefits but the other is neutral
Mutualism- Mutualism is the way two organisms biologically interact where each individual derives a fitness benefit
Parasitism- A type of symbiotic relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host.
