Answer:
A Conditioned Stimulus.
Step-by-step explanation:
The Classical Conditioning is a theory theorized by Ian Pavlov, and also known as Pavlovian conditioning. The theory suggests that new learning can be produced by combining two stimuli either in an animal or a person.
Conditioned Stimulus (CS) is a part of Classical Conditioning. Conditioned Stimulus are those stimuli that were previously considered a neutral stimulus. When conditioned stimulus associates with unconditioned stimulus, conditioned responses are formed.
In the given case, the lakeshore property is a conditioned stimulus because the pictures of lakeshore property (CS) were shown at the time of meal when they were eating delicious meals (UCS) which produced an unconditioned response of mouthwatering or drooling. So, when Henry took the tour of the property, a conditioned response of drooling was produced.
Thus, lakeshore property is a conditioned stimulus.