When aiden opens his refrigerator to get something to eat, he also gives his dog some food. now, whenever aiden opens the refrigerator door his dog begins to drool. this best illustrates: operant conditioning. the law of effect. observational learning. classical conditioning?

The answer is "classical conditioning".

Classical conditioning alludes to a learning method in which a naturally intense jolt (e. g. nourishment) is combined with a formerly unbiased boost (e. g. a ringer). It likewise alludes to the taking in process that outcomes from this matching, through which the unbiased boost comes to evoke a reaction (e. g. salivation) that is generally like the one inspired by the strong jolt.