Symbiosis is a biological interaction in which two different species live closely together and interact in a mutually beneficial way. This can include mutualistic relationships where both species benefit, such as in the case of a bee and a flower, as well as parasitic relationships, where one species benefits at the expense of the other. Symbiosis is a common phenomenon in nature and plays a crucial role in ecosystems and the evolution of species. Researchers in this area study the dynamics, mechanisms, and consequences of symbiotic relationships between organisms.