Comensalism: A commensal consumes the food that other species do not want.
Predation: One species (the predator) captures and kills the other one (the prey).
Inquilism: an occupant uses part of another living thing as a place to stay.
Mutualism: Both species benefit from each other, but they can survive in the absence of the other one.
Intraspecific competition: This take place among individuals of the same specie that need the same resource.
Parasitism; One species (the parasite) benefits from the other species (the host).
Interspecific competition: Two different species use the same resource.
Symbiosis: Neither species can survive if they are separated.
Cooperation: A positive relationship that benefits the individual as well as the group of population.
