Answer:
MUTUALISTIC RELATIONSHIP
Step-by-step explanation:
Organisms of same or different species tend to interact with one another in an ecosystem. The interaction between two organisms is referred to as SYMBIOSIS. Symbiosis, depending on whether or not, passes the oak.
The example in this question depicts an example of MUTUALISM, which is a relationship in which both organism benefits from the actions of one another. This is the case of the humming bird and flower species, where the bird benefits by deriving food from the flower species while the flower benefits by getting Its flower pollinated.