True or false classical conditioning occurs when the unconditioned stimulus evokes a response from a neutral stimulus.

False.

Two types of conditioning.
1) Classical conditioning
2) Operant conditioning.

Classical conditioning happens when an individual learns to associate two stimuli. This happens when an association is learned between an unconditioned stimulus and a conditioned stimulus. 

Operant conditioning happens when an individual associates a behaviour with a consequence. For example, when a behaviour produces a good consequence; the individual is conditioned to repeat the behaviour to garner the same good consequence, and vice versa.

Reactants are mean lol