Final answer:
Professor Marsh supports the Contiguity model of classical conditioning, which argues that classical conditioning occurs because two stimuli are paired closely in time.
Step-by-step explanation:
Professor Marsh supports the Contiguity model of classical conditioning, which argues that classical conditioning occurs because two stimuli are paired closely together in time. In classical conditioning, organisms learn to associate events or stimuli that repeatedly happen together. This associative process is studied by focusing on behaviors and asking if one stimulus can trigger a reflex that can be trained to be triggered by a different stimulus.