An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?

Explanation

An orchid growing as an epiphyte on a mango branch gets the benefit of exposure to light, while the mango tree does not drive any noticeable benefit. So in this interaction one species (archid) get benefitted the other (Mango) is neither armed nor benefitted. So the interactions between orchid and mango tree is commenasalism.