relationships in deciduous biome

The catapla hornworm feeds on and lays eggs on the catalpa tree's leaves, which is parasitism.

A bee and flower's mutualism.  The bee pollenates the flower, and the bee gets the pollen which they then use for a food source.

The cherries and maples living in such density show competition.  They are competing for the same resource- sunlight.  The ones that can get the most sunlight will grow taller, and thus become the dominant species in that community.

This is commensalism, because the cow is not being affected, yet the bird is getting fed off of the cow's back.