Describe the kind of relationship between orchids and trees, and explain why it can be classified as such.Many tropical orchids are epiphytes that...

I guess you would describe the relationship between
epiphytic orchids and the trees they grow on as one of commensalism. Commensalism means
that one organism in a relationship benefits, and the other is unaffected. Epiphytic
orchids grow on trees, but use them just for support. They do not obtain energy or
nutrients from the trees. Water and nutrients are obtained from the air, and from
compost on the trees. There are also terrestrial orchids, which are a different
type.