Identify the type of relationship between the organisms.

commensalism

prey-predator

parasitism

a stork eating a fish with its beak

fungi absorbing nutrients from a tree, causing the tree to decay

barnacles absorbing nutrients while harmlessly riding on the back of a whale

A stork eating fish with its beak = Predator/Prey

Fungi absorbing nutrients = Parasitism

Barnacles = Commensalism

Explanation:

A stork eating a fish is hunting, the stork is predator and the fish is prey.

The fungi is parasitism because it is benefiting while causing harm to its host.

The barnacles are commensalism, because they benefit from the whale but don't harm it.