Final answer:
In classical conditioning, delayed conditioning occurs when the CS continues until after the UCS is presented, while trace conditioning involves a short delay between the CS and UCS.
Step-by-step explanation:
In classical conditioning, the conditioned stimulus (CS) continues until after the unconditioned stimulus (UCS) is presented, which is known as delayed conditioning. On the other hand, in trace conditioning, there is a short period of time between the offset of the conditioned stimulus (CS) and the onset of the unconditioned stimulus (UCS).